The IIC function (SCL and SDA) takes precedence over the general purpose I/O function if the IIC is enabled. If the IIC module takes precedence, the SDA and SCL outputs are configured as open drain outputs. Refer to HCS12 Inter-Integrated Circuit (IIC) BlockGuide (Motorola document order number, S12IICV2/D) for details.
To simplify circuit construction and emphasize software development, several user features have been connected to the MCU_PORT through FET switches and jumpers. The FET switches are controlled by enable signals that are also routed to the MCU_PORT header. This setup allows the user to electronically connect and disconnect each connected feature group. A 6-position jumper (UFEA or JP10) allows the user to disconnect the enable signal if applying the associated port to other uses. Connected Features include a POT, 4 push-button switches, and 4 LED’s. Each feature group function is more fully described elsewhere in this User Guide.
In FPM VREG_3V3 monitors the input voltage V DDA . Whenever V DDA drops below level V LVIA the status bit LVDS is set to 1. Vice versa, LVDS is reset to 0 when V DDA rises above level V LVID . An interrupt, indicated by flag LVIF=1, is triggered by any change of the status bit LVDS if interrupt enable bit LVIE=1.
Each channel has a polarity bit to allow starting a waveform cycle with a high or low signal. This is shown on the block diagram as a mux select of either the Q output or the Q output of the PWM output flip flop. When one of the bits in the PWMPOL register is set, the associated PWM channel output is high at the beginning of the waveform, then goes low when the duty count is reached. Conversely, if the polarity bit is zero, the output starts low and then goes high when the duty count is reached.
The XCLKS is an input signal which controls whether a crystal in combination with the internal Colpitts (low power) oscillator is used or whether Pierce oscillator/external clock circuitry is used. The XCLKS signal is sampled during reset with the rising edge of RESET. Table 2-1 lists the state coding of the sampled XCLKS signal. Refer to device specification for polarity of the XCLKS pin.
Power may be supplied to the module through the pins J1-1 and J1-2. Use of this option requires a regulated voltage input limited to the range of +3.3VDC to +5VDC. This input is connected directly to the module power and ground planes. Care should be exercised not to over-drive this input. Use of connector J1 to supply +3.3V to the module requires disabling the voltage supervisor (LV1) by opening cut-trace CT-1. See the Low-Voltage Detect section below. To re-enable the low-voltage supervisor, install a 1206 sized 0-ohm resistor at CT1. Connector J1 may also be used to source +5V power from the on-board regulator to external modules attached to connector J1. The PWR_SEL option header determines how power is routed to the module.
In conclusion, TH4-7-5 cells show a restricted HIV-1 infec- tion phenotype also observed upon exposure of primary human fetal brain astrocytes to HIV-1 (77) and in some brains from pediatric AIDS cases (64, 76). Therefore, TH4-7-5 cells are a suitable model system for unraveling the molecular mecha- nisms underlying restriction of virus production in astrocytes. Since HIV-1 repression in these cells is associated with a cell- determined constitutive block in Rev function, study of HIV-1 regulation in these cells should allow insight into cellular ele- ments involved in the Rev-RRE regulatory axis. Finally, hu- man glial cells may be a source of potential Rev-inhibitory factors which may provide the basis for design of antiviral strategies aimed at repression of virus production.
Figure 3-1 shows the FTS32K memory map. The HCS12 architecture places the Flash array addresses between $4000 and $FFFF, which corresponds to three 16K byte pages. The content of the HCS12 Core PPAGE register is used to map the logical middle page ranging from address $8000 to $BFFF to either physical 16K byte page in the physical memory. 1 Shown within the pages are a protection/options field, described in Table 3-1, and user defined Flash protected sectors, described in Table 3-2.
ing application. To formalize the sequential nature of employing the protocols, we construct a stack. As shown in Figure 1.1, for the Internet the stack has four layers. The top layer is the application layer. It contains the application processes that gen- erate and manipulate data and request communication support from the lower lay- ers. The next layer is the transport layer. It contains UDP and TCP. They initiate connectionless transport or initiate and terminate connection-oriented transport with error control and flow control. The transport layer protocol data unit (PDU) contains identifying numbers for the ports through which the application layer com- municates with the transport layer. The next layer is the Internet layer. It contains IP and other associated protocols. They provide the frame with originating and termi- nating addresses to guide the PDU to its destination. The bottom layer is the net- work interface layer. It employs standard data link protocols and converts the data stream to a signal stream for transmission over physical facilities to the destination stack. Here, the frame is handed off from layer to layer in reverse. The bottom layer passes the PDU to the Internet layer, the Internet layer passes the PDU to the trans- port layer, and the transport layer passes it to the application that can use the data being delivered. In doing this, each receiving layer makes use of the information added by its corresponding sending layer. A further description of the Internet stack can be found in Chapter 2. My purpose here is to set the stage for discussion of some application layer protocols and the protocols that make up TCP/IP.
The above figure shows overall block diagram new model multilevel inverter. The block comprises of power guide comparator, signal inverter, multilevel inverter voltage measurement, and current measurement & RMS value with RL load. Each block has sub system.For in comparator block two signals are associated in sine wave is compared with repeated signal. It helps to gain output during half cycle. The signal inverter input is acquire from the comparator output.
There are two types of breakpoint requests supported by the DBG module, tagged and forced. Tagged breakpoints are associated with opcode addresses and allow breaking just before a specific instruction executes. Forced breakpoints are not associated with opcode addresses and allow breaking at the next instruction boundary. The type of breakpoint based on Comparators A and B is determined by TRGSEL in the DBGC1 register (TRGSEL = 1 for tagged breakpoint, TRGSEL = 0 for forced breakpoint). Table 4-3 illustrates the type of breakpoint that will occur based on the debug run.
These two bits select the length of the second phase of the sample time in units of ATD conversion clock cycles. Note that the ATD conversion clock period is itself a function of the prescaler value (bits PRS4-0). The sample time consists of two phases. The first phase is two ATD conversion clock cycles long and transfers the sample quickly (via the buffer amplifier) onto the A/D machine’s storage node. The second phase attaches the external analog signal directly to the storage node for final charging and high accuracy. Table 3-5 lists the lengths available for the second sample phase.
When this bit is set, the MSCAN performs an internal loop back which can be used for self test operation. The bit stream output of the transmitter is fed back to the receiver internally. The RXCAN input pin is ignored and the TXCAN output goes to the recessive state (logic ‘1’). The MSCAN behaves as it does normally when transmitting and treats its own transmitted message as a message received from a remote node. In this state, the MSCAN ignores the bit sent during the ACK slot in the CAN frame Acknowledge field to ensure proper reception of its own message. Both transmit and receive interrupts are generated.
A read of SPISR with SPTEF=1 followed by a write to SPIDR puts data into the transmit data register. When a transfer is complete, received data is moved into the receive data register. Data may be read from this double-buffered system any time before the next transfer has completed. This 8-bit data register acts as the SPI receive data register for reads and as the SPI transmit data register for writes. A single SPI register address is used for reading data from the read data buffer and for writing data to the transmit data register.
216116 AA June 2002 Modified “Safety Notes” page xxi and “Sicherheitshinweise” page xxv; modified Figure 2 “Block Diagram of the CPU Board” page 1-5; replaced EN 50081/2 with EN 55022/4 in Table 1 “Standard Compliance” page 1-8; modified and updated section “Ordering Information” page 1-9; removed table “Qualified Memory Modules” and accompanying safety note in section “Mem- ory Modules” page 2-8; modified section “Setting the SCSI Termination” page 2-10; corrected description of switch SW5-4 in Figure 5 “SCSI Termination Concept of SPARC/CPU-54 and IOBP-54” page 2-11; modified description of switches 4-3, 4-4, 5-4, 7-1 and 7-2 in Table 9 “Switch Settings” page 2-13; added Figure 7 “Location of Switches on Board’s Bottom Side” page 2-13; modified sections “Boot Devices OTP PROM and Flash EPROM” page 2-18 and “User Application” page 2-18; added information on problem with VMEbus read errors and Solaris 8 version 4/01 to “Installing Solaris” page 2-19 and the “Troubleshooting” chap- ter; moved section “Battery Exchange” to Appendix B; changed Table 15 “Flash Seg- mentation and Write Protection” page 2-23; added description of Ethernet LEDs in Table 16 “Description of Front Panel LEDs” page 3-4; modified section “Serial I/O” page 3-7; deleted section “PCI Control Regis- ter”; modified section “OBDIAG” page 4-10; added chapter “Maps and Registers” page 5- 1 from Reference Guide with following mod- ifications: corrected description of signal ID[3..0] in “System Configuration Identifica- tion Register” page 5-14; modified descrip- tion of the Serial Protocol Status register page 5-16; changed description of bits 0-4 in Table 42 “Switch 4 and 5 Status Register” page 5-17; modified description of the RS- Order