ST7232A_0512 datasheet(98/157 Pages) STMICROELECTRONICS

Part #	ST7232A_0512

Description	8-BIT MICROCONTROLLER WITH 8K FLASH/ROM, ADC, 4 TIMERS, SPI, SCI INTERFACE

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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ST7232A

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SERIAL COMMUNICATIONS INTERFACE (Cont’d)

CONTROL REGISTER 1 (SCICR1)

Read/Write

Reset Value: x000 0000 (x0h)

Bit 7 = R8 Receive data bit 8.

This bit is used to store the 9th bit of the received

word when M=1.

Bit 6 = T8 Transmit data bit 8.

This bit is used to store the 9th bit of the transmit-

ted word when M=1.

Bit 5 = SCID Disabled for low power consumption

When this bit is set the SCI prescalers and outputs

are stopped and the end of the current byte trans-

fer in order to reduce power consumption.This bit

is set and cleared by software.

0: SCI enabled

1: SCI prescaler and outputs disabled

Bit 4 = M Word length.

This bit determines the word length. It is set or

cleared by software.

0: 1 Start bit, 8 Data bits, 1 Stop bit

1: 1 Start bit, 9 Data bits, 1 Stop bit

Note: The M bit must not be modified during a data

transfer (both transmission and reception).

Bit 3 = WAKE Wake-Up method.

This bit determines the SCI Wake-Up method, it is

set or cleared by software.

0: Idle Line

1: Address Mark

Bit 2 = PCE Parity control enable.

This bit selects the hardware parity control (gener-

ation and detection). When the parity control is en-

abled, the computed parity is inserted at the MSB

position (9th bit if M=1; 8th bit if M=0) and parity is

checked on the received data. This bit is set and

cleared by software. Once it is set, PCE is active

after the current byte (in reception and in transmis-

sion).

0: Parity control disabled

1: Parity control enabled

Bit 1 = PS Parity selection.

This bit selects the odd or even parity when the

parity generation/detection is enabled (PCE bit

set). It is set and cleared by software. The parity

will be selected after the current byte.

0: Even parity

1: Odd parity

Bit 0 = PIE Parity interrupt enable.

This bit enables the interrupt capability of the hard-

ware parity control when a parity error is detected

(PE bit set). It is set and cleared by software.

0: Parity error interrupt disabled

1: Parity error interrupt enabled.

70

R8

T8

SCID

M

WAKE

PCE

PS

PIE

1

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ST7232A_0512 Datasheet(PDF) 98 Page - STMicroelectronics

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