DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 750

• 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

Section 14 Realtime Clock (RTC)
14.5
14.5.1
The following RTC registers cannot be written to during an RTC count (while bit 0 = 1 in RCR2).
RSECCNT, RMINCNT, RHRCNT, RDAYCNT, RWKCNT, RMONCNT, RYRCNT
The RTC count must be stopped before writing to any of the above registers.
14.5.2
The method of using the periodic interrupt function is shown in figure 14.5.
A periodic interrupt can be generated periodically at the interval set by bits PES2 to PES0 in
RCR2. When the time set by bits PES2 to PES0 has elapsed, the PEF is set to 1.
The PEF is cleared to 0 upon periodic interrupt generation or when bits PES2 to PES0 are set.
Periodic interrupt generation can be confirmed by reading this bit, but normally the interrupt
function is used.
14.5.3
When a transition to standby mode is made after registers in the RTC are set, sometimes counting
is not performed correctly. In case the registers are set, be sure to make a transition to standby
mode after performing one dummy read the register.
Rev. 3.00 Sep. 28, 2009 Page 718 of 1650
REJ09B0313-0300
Usage Notes
Register Writing during RTC Count
Use of Real-time Clock (RTC) Periodic Interrupts
Transition to Standby Mode after Setting Register
Figure 14.5 Using Periodic Interrupt Function
Elapse of time set by PES
Set PES, clear PEF
Clear PEF
Set PES2 to PES0
and clear PEF to 0
in RCR2
Clear PEF to 0