MC68HC908GP32CB Freescale Semiconductor, MC68HC908GP32CB Datasheet - Page 135

• Manufacturer Part Number: MC68HC908GP32CB
• Description: IC MCU 32K FLASH 8MHZ 42-SDIP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GP32CB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 33
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 42-DIP (0.600", 15.24mm)
• For Use With: M68EVB908GP32 - BOARD EVALUATION FOR HC908GP32
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

13.4.2 Transmitter
Figure 13-4
The baud rate clock source for the SCI can be selected via the configuration bit, SCIBDSRC. Source
selection values are shown in
13.4.2.1 Character Length
The transmitter can accommodate either 8-bit or 9-bit data. The state of the M bit in SCI control register 1
(SCC1) determines character length. When transmitting 9-bit data, bit T8 in SCI control register 3 (SCC3)
is the ninth bit (bit 8).
Freescale Semiconductor
SL = 0 => SCICLK = CGMXCLK
SL = 1 => SCICLK = BUS CLOCK
BUS CLOCK
CGMXCLK
shows the structure of the SCI transmitter.
SCIBDSRC
CONFIG2
FROM
SL
INTERRUPT REQUEST
TRANSMITTER CPU
X
SCP1
SCP0
SCR2
SCR1
SCR0
÷ 4
SCALER
PRE-
Figure 13-4. SCI Transmitter Block Diagram
Figure
DIVIDER
BAUD
PEN
PTY
MC68HC908GP32 Data Sheet, Rev. 10
13-4.
TXINV
÷ 16
GENERATION
PARITY
SCTE
SCTIE
TC
TCIE
T8
M
H
8
SCTIE
7
SCTE
TCIE
TC
SCI DATA REGISTER
6
SHIFT REGISTER
INTERNAL BUS
TRANSMIT
5
11-BIT
CONTROL LOGIC
4
TRANSMITTER
3
2
1
LOOPS
ENSCI
SBK
TE
0
L
Functional Description
PTE0/TxD
135