M38K09RFS datasheet(294/328 Pages) RENESAS

294 / 328 page

3.4 List of registers

Rev.2.00

Oct 05, 2006

page 53 of 89

38K0 Group

REJ09B0337-0200

APPENDIX

Fig. 3.4.36 Structure of EP02 byte number register 1

B1BYT02

[6:0]

–

EP02 byte number register 1 (EP02BYT1) [address 001F16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

IN : Transmit byte number bit

OUT : Receive byte number bit

Not used

–: State remaining

Single buffer mode: These bits are invalid.

Double buffer mode : Set the transmitting byte number

of buffer 1.

Single buffer mode: These bits are invalid.

Double buffer mode : The received byte number of buffer 1

is automatically set.

Write “0” when writing.

“0” is read when reading.

Fig. 3.4.37 Structure of EP03 byte number register 1

B1BYT03

[6:0]

–

EP03 byte number register 1 (EP03BYT1) [address 001F16]

Bit name

Bit symbol

At reset

Function

H/W

S/W

IN : Transmit byte number bit

OUT : Receive byte number bit

Not used

–: State remaining

Single buffer mode: These bits are invalid.

Double buffer mode : Set the transmitting byte number

of buffer 1.

Single buffer mode: These bits are invalid.

Double buffer mode : The received byte number of buffer 1

is automatically set.

Write “0” when writing.

“0” is read when reading.

Fig. 3.4.38 Structure of Prescaler12, Prescaler X

Prescaler 12, Prescaler X

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Prescaler 12 (PRE12) [Address : 2016]

Prescaler X (PREX) [Address : 2416]

•Set a count value of each prescaler.

•The value set in this register is written to both each prescaler

and the corresponding prescaler latch at the same time.

•When this register is read out, the count value of the corres-

ponding prescaler is read out.

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