Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 17 ASYNCHRONOUS SERIAL INTERFACE C (UARTC)
R01UH0042EJ0500 Rev.5.00 Page 754 of 1513
Aug 12, 2011
(2) UARTCn control register 1 (UCnCTL1)
The UCnCTL1 register is an 8-bit register that selects the UARTCn base clock.
This register can be read or written in 8-bit units.
Reset sets this register to 00H.
Caution Clear the UCnCTL0.UCnPWR bit to 0 before rewriting the UCnCTL1 register.
0UCnCTL1
(n = 0 to 4)
0 0 0 UCnCKS3UCnCKS2 UCnCKS1 UCnCKS0
654321
After reset: 00H R/W Address: UC0CTL1 FFFFFA01H, UC1CTL1 FFFFFA11H,
UC2CTL1 FFFFFA21H, UC3CTL1 FFFFFA31H,
UC4CTL1 FFFFFA41H
7 0
f XX /2
f
XX /4
f
XX /8
f
XX /16
f
XX /32
f
XX /64
f
XX /128
f
XX /256
f
XX /512
f
XX /1,024
f
XX /2,048
External clock
Note
(ASCKC0 pin)
Setting prohibited
UCnCKS2
0
0
0
0
1
1
1
1
0
0
0
0
UCnCKS3
0
0
0
0
0
0
0
0
1
1
1
1
Base clock (f
UCLK ) selectionUCnCKS1
0
0
1
1
0
0
1
1
0
0
1
1
UCnCKS0
0
1
0
1
0
1
0
1
0
1
0
1
Other than above
Note Only UARTC0 is valid; setting UARTC1 to UARTC4 is prohibited.
Remark f
XX: Main clock frequency