Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 12 REAL-TIME COUNTER
R01UH0042EJ0500 Rev.5.00 Page 640 of 1513
Aug 12, 2011
12.3 Registers
The real-time counter is controlled by the following 18 registers.
(1) Real-time counter control register 0 (RC1CC0)
The RC1CC0 register selects the real-time counter input clock.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
RC1PWR
Stops real-time counter operation.
Enables real-time counter operation.
RC1PWR
0
1
Real-time counter operation control
RC1CC0 RC1CKS 0 0 0
0
0 0
654321
Selects fXT as operation clock.
Selects f
BRG as operation clock.
RC1CKS
0
1
Operation clock selection
07
After reset: 00H R/W Address: FFFFFADDH
Cautions 1. Follow the description in 12.4.8 Initializing real-time counter when stopping (RC1PWR =
1 → 0) the real-time counter while it is operating.
2. The RC1CKS bit can be rewritten only when the real-time counter is stopped (RC1PWR
bit = 0). Furthermore, rewriting the RC1CKS bit at the same time as setting the RC1PWR
bit from 0 to 1 is prohibited.
(2) Real-time counter control register 1 (RC1CC1)
The RC1CC1 register is an 8-bit register that starts or stops the real-time counter, controls the RTCCL and
RTC1HZ pins, selects the 12-hour or 24-hour system, and sets the fixed-cycle interrupt function.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.