DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 727

• Manufacturer Part Number: DS72030W200FPV
• Description: MPU, 32BIT, SH7203, ROMLESS, 240QFP
• Manufacturer: Renesas Electronics America
• Series: SH7200r

Specifications of DS72030W200FPV

• Core Size: 32bit
• Program Memory Size: 32KB
• Cpu Speed: 200MHz
• Digital Ic Case Style: QFP
• No. Of Pins: 240
• Supply Voltage Range: 1.1V To 1.3V
• Operating Temperature Range: -20°C To +85°C
• Svhc: No SVHC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.3.1
R64CNT indicates the state of the divider circuit between 64 Hz and 1 Hz.
Reading this register, when carry from 128-Hz divider stage is generated, sets the CF bit in the
RTC control register 1 (RCR1) to 1 so that the carrying and reading 64 Hz counter are performed
at the same time is indicated. In this case, the R64CNT should be read again after writing 0 to the
CF bit in RCR1 since the read value is not valid.
After the RESET bit or ADJ bit in the RTC control register 2 (RCR2) is set to 1, the RTC divider
circuit is initialized and R64CNT is initialized.
Bit
7
6
5
4
3
2
1
0
Bit Name
⎯
1 Hz
2 Hz
4 Hz
8 Hz
16 Hz
32 Hz
64 Hz
64-Hz Counter (R64CNT)
Initial value:
Initial
Value
0
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
Undefined R
R/W:
BIt:
R
7
0
-
R/W
R
1Hz
R
6
-
Description
Reserved
This bit is always read as 0. The write value should
Indicate the state of the divider circuit between
64 Hz and 1 Hz.
always be 0.
2Hz
R
5
-
4Hz
R
4
-
8Hz
R
3
-
Rev. 3.00 Sep. 28, 2009 Page 695 of 1650
16Hz 32Hz 64Hz
R
2
-
R
1
-
Section 14 Realtime Clock (RTC)
R
0
-
REJ09B0313-0300