MC908AP32CFBE Freescale Semiconductor, MC908AP32CFBE Datasheet - Page 187

• Manufacturer Part Number: MC908AP32CFBE
• Description: IC MCU 32K FLASH 8MHZ 44QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AP32CFBE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 32
• Program Memory Size: 32KB (32K 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: 44-QFP
• Controller Family/series: HC08
• No. Of I/o's: 32
• Ram Memory Size: 2KB
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• Processor Series: HC08AP
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908AP64E, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

12.5.2.2 Character Transmission
During an SCI transmission, the transmit shift register shifts a character out to the TxD pin. The IRSCI
data register (IRSCDR) is the write-only buffer between the internal data bus and the transmit shift
register. To initiate an SCI transmission:
At the start of a transmission, transmitter control logic automatically loads the transmit shift register with
a preamble of logic 1s. After the preamble shifts out, control logic transfers the IRSCDR data into the
transmit shift register. A logic 0 start bit automatically goes into the least significant bit position of the
transmit shift register. A logic 1 stop bit goes into the most significant bit position.
Freescale Semiconductor
BUS CLOCK
CGMXCLK
1. Enable the SCI by writing a logic 1 to the enable SCI bit (ENSCI) in IRSCI control register 1
2. Enable the transmitter by writing a logic 1 to the transmitter enable bit (TE) in IRSCI control register
3. Clear the SCI transmitter empty bit by first reading IRSCI status register 1 (IRSCS1) and then
4. Repeat step 3 for each subsequent transmission.
(IRSCC1).
2 (IRSCC2).
writing to the IRSCDR.
SL = 0 => X = A
SL = 1 => X = B
A
B
CKS
SL
X
SCP1
SCP0
SCR1
SCR2
SCR0
SCALER
PRE-
MC68HC908AP Family Data Sheet, Rev. 4
DIVIDER
BAUD
Figure 12-7. SCI Transmitter
PEN
PTY
÷ 16
GENERATION
PARITY
DMATE
DMATE
SCTIE
SCTE
DMATE
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
4
CONTROL LOGIC
TRANSMITTER
3
2
1
SCI Functional Description
LOOPS
ENSCI
SBK
TE
0
L
SCI_TxD
187