3069RF-ZTAT Datasheet, PDF (224/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

• Repeat mode
Bit
7
6
5
4
3
2
1
0
Initial value
Read/Write
Bit
R/W
7
Undetermined
R/W R/W R/W R/W R/W
ETCRH
Transfer counter
6
5
4
3
2
R/W R/W
1
0
Initial value
Undetermined
Read/Write
R/W
R/W R/W R/W R/W R/W
R/W R/W
ETCRL
Initial count
In repeat mode, ETCRH functions as an 8-bit transfer counter and ETCRL holds the initial
transfer count. ETCRH is decremented by 1 each time one transfer is executed. When ETCRH
reaches H'00, the value in ETCRL is reloaded into ETCRH and the same operation is repeated.
The ETCRs are not initialized by a reset or in standby mode.
Rev. 5.0, 09/04, page 202 of 978