ST72104G2 datasheet(38/135 Pages) STMICROELECTRONICS

Part #	ST72104G2

Description	8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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ST72104G, ST72215G, ST72216G, ST72254G

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MISCELLANEOUS REGISTERS (Cont’d)

MISCELLANEOUS REGISTER 2 (MISCR2)

Read/Write

Reset Value: 0000 0000 (00h)

Bit 7:4 = Reserved

always read as 0

Bit 5 = 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 4 = 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 10. Miscellaneous Register Map and Reset Values

70

0

MOD SOD

SSM

SSI

Address

(Hex.)

Register

Label

765

4

321

0

0020h

MISCR1

Reset Value

IS11

0

IS10

0

MCO

0

IS01

0

IS00

0

CP1

0

CP0

0

SMS

0

0040h

MISCR2

Reset Value

0

MOD

0

SOD

0

SSM

0

SSI

0

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