M37640E8FP 查看數據表（PDF） - Mitsumi

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M37640E8FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

Ver 1.4

MITSUBISHI MICROCOMPUTERS

7640 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

URXDx

Start bit

UxBRG

Clock

Edge 2-of-3

detection sampling

RBF

UxTRB1

Read

D0

2-of-3

sampling

Fig. 1.46. UART Receive Operation Waveforms

Stop bit

Start bit

D0

2-of-3

Edg 2-of-3

sampling detection sampling

2-of-3

sampling

CTS (input)

TXD (output)

start

DATA

RXD (input) DATA

stop programmable delay

RTS (output)

In both examples, the Transmit and Receive have already been enabled

Fig. 1.47. CTSx and RTSx Timing Examples

start

DATA

MSB

7

RTS3

RTS2

RTS1

RTS0 Reserved

Reserved

Reserved

Reserved

LSB

0

Address: 003616 ,003E16

Access: R/W

Reset: 8016

0-3

Reserved (Read/Write “0’)

Fig. 1.48. UxRTSC Register

RTS3:0

RTS Assertion Delay count 3:0 (bits 7, 6, 5, 4)

0000: No delay, RTS asserts immediately after receive operation completes

0001: RTS asserts 8 bit-times after receive operation completes

0010: RTS asserts 16 bit-times after receive operation completes

0011: RTS asserts 24 bit-times after receive operation completes

1000: RTS asserts 64 bit-times after receive operation completes

1110: RTS asserts 112 bit-times after receive operation completes

1111: RTS asserts 120 bit-times after receive operation completes

46

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