ST72F262G2B5 datasheet(47/172 Pages) STMICROELECTRONICS

Part #	ST72F262G2B5

Description	8-BIT MCU WITH FLASH OR ROM MEMORY, ADC, TWO 16-BIT TIMERS, I2C, SPI, SCI INTERFACES

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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MISCELLANEOUS REGISTERS (Cont’d)

MISCELLANEOUS REGISTER 2 (MISCR2)

Read/Write

Reset Value: 0000 0000 (00h)

Caution: This register has been provided for com-

patibility with the ST72254 family only. The same

bits are available in the SPICSR register. New ap-

plications must use the SPICSR register. Do not

use both registers, this will cause the SPI to mal-

function.

Bits 7:4 = Reserved always read as 0

Bits 3 = MOD SPI Master Output Disable

This bit is set and cleared by software. When set, it

disables the SPI Master (MOSI) output signal.

0: SPI Master Output enabled.

1: SPI Master Output disabled.

Bit 2 = SOD SPI Slave Output Disable

This bit is set and cleared by software. When set it

disable the SPI Slave (MISO) output signal.

0: SPI Slave Output enabled.

1: SPI Slave Output disabled.

Bit 1 = SSM SS mode selection

This bit is set and cleared by software.

0: Normal mode - the level of the SPI SS signal is

input from the external SS pin.

1: I/O mode, the level of the SPI SS signal is read

from the SSI bit.

Bit 0 = SSI SS internal mode

This bit replaces the SS pin of the SPI when the

SSM bit is set to 1. (see SPI description). It is set

and cleared by software.

Table 11. Miscellaneous Register Map and Reset Values

70

0

MOD SOD

SSM

SSI

Address

(Hex.)

Register

Label

76543

210

0020h

MISCR1

Reset Value

IS11

0

IS10

0

MCO

0

IS01

0

IS00

0

CP1

0

CP0

0

SMS

0

0040h

MISCR2

Reset Value

0000

MOD

0

SOD

0

SSM

0

SSI

0

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