7540 datasheet(179/366 Pages) RENESAS

Part #	7540

Description	8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 740 SERIES

PDF	366 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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179 / 366 page

2-103

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPLICATION

2.6 Serial I/O1

Fig. 2.6.5 Structure of UART control register

Fig. 2.6.6 Structure of Baud rate generator

b7b6b5b4b3b2b1b0

Function

At reset

Name

UART control register (UARTCON) [Address : 1B16]

Nothing is allocated for these bits. These are write disabled bits.

When these bits are read out, the values are “1”.

UART control register

Character length

selection bit (CHAS)

Parity enable bit

(PARE)

Stop bit length selection

bit (STPS)

Parity selection bit

(PARS)

In output mode

0 : CMOS output

1 : N-channel open-drain

output

0 : 8 bits

1 : 7 bits

0 : Parity checking disabled

1 : Parity checking enabled

0 : 1 stop bit

1 : 2 stop bits

0 : Even parity

1 : Odd parity

P11/TxD P-channel

output disable bit

(POFF)

Baud rate generator

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Baud rate generator (BRG) [Address : 1C 16]

Set a count value of baud rate generator.

7540 Datasheet(PDF) 179 Page - Renesas Technology Corp

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