MC68HC908AP64CB Freescale Semiconductor, MC68HC908AP64CB Datasheet - Page 186

• Manufacturer Part Number: MC68HC908AP64CB
• Description: IC MCU 64K FLASH 8MHZ 42SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AP64CB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 30
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• For Use With: DEMO908AP64E - BOARD DEMO FOR 908AP64DEMO908AP64 - BOARD DEMO FOR 908AP64
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Infrared Serial Communications Interface Module (IRSCI)
The SCI allows full-duplex, asynchronous, NRZ serial communication between the MCU and remote
devices, including other MCUs. The transmitter and receiver of the SCI operate independently, although
they use the same baud rate generator. During normal operation, the CPU monitors the status of the SCI,
writes the data to be transmitted, and processes received data.
12.5.1 Data Format
The SCI uses the standard non-return-to-zero mark/space data format illustrated in
12.5.2 Transmitter
Figure 12-7
The baud rate clock source for the SCI can be selected by the CKS bit, in the SCI baud rate register (see
12.9.7 IRSCI Baud Rate
12.5.2.1 Character Length
The transmitter can accommodate either 8-bit or 9-bit data. The state of the M bit in IRSCI control register
1 (IRSCC1) determines character length. When transmitting 9-bit data, bit T8 in IRSCI control register 3
(IRSCC3) is the ninth bit (bit 8).
186
•
•
A control bit, CKS, is added to the SCI baud rate control register to select between two input clocks
for baud rate clock generation
The TXINV bit is removed from the SCI control register 1
shows the structure of the SCI transmitter.
For SCI operations, the IR sub-module is transparent to the SCI module.
Data at going out of the SCI transmitter and data going into the SCI receiver
is always in SCI format. It makes no difference to the SCI module whether
the IR sub-module is enabled or disabled.
This SCI module is a standard HC08 SCI module with the following
modifications:
START
START
BIT
BIT
BIT 0
BIT 0
Register).
BIT 1
BIT 1
MC68HC908AP Family Data Sheet, Rev. 4
BIT 2
BIT 2
Figure 12-6. SCI Data Formats
BIT 3
BIT 3
BIT M IN IRSCC1 CLEAR
8-BIT DATA FORMAT
BIT M IN IRSCC1 SET
9-BIT DATA FORMAT
BIT 4
BIT 4
NOTE
NOTE
BIT 5
BIT 5
BIT 6
BIT 6
PARITY
BIT 7
BIT 7
BIT
PARITY
STOP
BIT 8
BIT
BIT
START
STOP
NEXT
BIT
BIT
START
NEXT
Freescale Semiconductor
BIT
Figure
12-6.