Ibm uPD78082 Manual do Utilizador descarregar pdf (Página 163)

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CHAPTER 11 SERIAL INTERFACE CHANNEL 2

11.3 Serial Interface Channel 2 Control Registers

Serial interface channel 2 is controlled by the following four registers.

• Serial Operating Mode Register 2 (CSIM2)

• Asynchronous Serial Interface Mode Register (ASIM)

• Asynchronous Serial Interface Status Register (ASIS)

• Baud Rate Generator Control Register (BRGC)

(1) Serial operating mode register 2 (CSIM2)

This register is set when serial interface channel 2 is used in the 3-wire serial I/O mode.

CSIM2 is set with a 1-bit or 8-bit memory manipulation instruction.

RESET input sets CSIM2 to 00H.

Figure 11-3. Serial Operating Mode Register 2 Format

Cautions 1. Set 0 to the bits 0 and 3 to 6.

2. When UART mode is selected, CSIM2 should be set to 00H.

65432107

Symbol

CSIM2 CSIE2 0 0 0 0

CSIM

CSCK 0

FF72H 00H R/W

Address After Reset R/W

CSCK

Clock Selection in 3-wire Serial I/O Mode

Input clock from off-chip to SCK2 pin

Dedicated baud rate generator output

CSIM22

First Bit Specification

MSB

LSB

CSIE2

Operation Control in 3-wire Serial I/O Mode

Operation stopped

Operation enabled

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Ibm uPD78082 Manual do Utilizador Página 163