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參數(shù)資料
| 型號(hào)： | MC68B912B32 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 2.5V 100ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference 3-SOT-23 -40 to 125 |
| 中文描述： | 16位微控制器 |
| 文件頁(yè)數(shù)： | 84/128頁(yè) |
| 文件大?。?/td> | 748K |
| 代理商： | MC68B912B32 |
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MOTOROLA
84
MC68HC912B32
MC68HC912B32TS/D
Figure 20 Serial Communications Interface Block Diagram
13.2.1 Data Format
The serial data format requires the following conditions:
An idle-line in the high state before transmission or reception of a message.
A start bit (logic zero), transmitted or received, that indicates the start of each character.
Data that is transmitted or received least significant bit (LSB) first.
A stop bit (logic one), used to indicate the end of a frame. (A frame consists of a start bit, a char-
acter of eight or nine data bits and a stop bit.)
A BREAK is defined as the transmission or reception of a logic zero for one frame or more.
This SCI supports hardware parity for transmit and receive.
Rx Baud Rate
Tx Baud Rate
MCLK
DIVIDER
10-11 BIT SHIFT REG
MSB
TxD BUFFER/SC0DRL
TxMTR CONTROL
SC0CR2/SCI CTL 2
SC0CR1/SCI CTL 1
SC0SR1/INT STATUS
DATA RECOVERY
10-11 BIT SHIFT REG
TxD BUFFER/SC0DRL
SC0BD/SELECT
LSB
RxD
PS0
TxD
PS1
P
WAKE-UP LOGIC
SC0CR1/SCI CTL 1
SC0SR1/INT STATUS
SC0CR2/SCI CTL 2
INT REQUEST LOGIC
MSB
LSB
INT REQUEST LOGIC
SCI RECEIVER
SCI TRANSMITTER
DATA BUS
PARITY
DETECT
PARITY
GENERATOR
HC12B32 SCI BLOCK
TO
INTERNAL
LOGIC
BAUD RATE
CLOCK
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