M38045FEHKP datasheet(176/387 Pages) RENESAS

176 / 387 page

2-52

APPLICATION

2.4 Serial interface

Rev.1.00 Jan 14, 2005

REJ09B0212-0100Z

3804 Group (Spec.H)

Serial I/O2 control register

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O2 control register

(SIO2CON: address 001D16)

Name

Functions

At reset R W

3 Serial I/O2 port

selection bit

SRDY2 output

enable bit

0: I/O port (P53)

1: SRDY2 signal output

0: LSB first

1: MSB first

0: External clock

1: Internal clock

Transfer direction

selection bit

Serial I/O2

synchronous

clock selection bit

P51/SOUT2

P-channel output

disable bit

0: I/O port (P51, P52)

1: SOUT2, SCLK2 signal output

0 0 0: f(XIN)/8

0 0 1: f(XIN)/16

0 1 0: f(XIN)/32

0 1 1: f(XIN)/64

1 1 0: f(XIN)/128

1 1 1: f(XIN)/256

0: CMOS output

(in output mode)

1: N-channel open-drain

output (in output mode)

b2b1b0

Internal

synchronous clock

selection bits

Fig. 2.4.9 Structure of Serial I/O2 control register

Fig. 2.4.8 Structure of Baud rate generator 1 and Baud rate generator 3

Baud rate generator i (i = 1, 3)

b7 b6 b5 b4 b3 b2 b1 b0

Baud rate generator i

(BRGi (i=1, 3): address 001C16, 002F16)

Undefined

At reset R W

Functions

Set a count value of baud rate generator.

Note: Write to this register while transmit/receive operation is stopped.

Undefined

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