UPD70F3740GC-UEU-AX Renesas Electronics America, UPD70F3740GC-UEU-AX Datasheet - Page 403

• Manufacturer Part Number: UPD70F3740GC-UEU-AX
• Description: MCU 32BIT V850ES/JX3 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3r

Specifications of UPD70F3740GC-UEU-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3
10.3 Control Registers
R01UH0015EJ0300 Rev.3.00
Sep 30, 2010
The following registers are provided for the watch timer.
• Prescaler mode register 0 (PRSM0)
• Prescaler compare register 0 (PRSCM0)
• Watch timer operation mode register (WTM)
(1) Prescaler mode register 0 (PRSM0)
Cautions 1. Do not change the values of the BGCS00 and BGCS01 bits during watch timer operation.
The PRSM0 register controls the generation of the watch timer count clock.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
2. Set the PRSM0 register before setting the BGCE0 bit to 1.
3. Set the PRSM0 and PRSCM0 registers according to the main clock frequency that is used
PRSM0
so as to obtain an f
After reset: 00H
BGCS01
BGCE0
0
1
0
0
1
1
0
BGCS00
Disabled
Enabled
R/W
BRG
0
1
0
1
0
frequency of 32.768 kHz.
Address: FFFFF8B0H
f
f
f
f
X
X
X
X
/2
/4
/8
0
Selection of watch timer source clock (f
Main clock operation enable
BGCE0
< >
5 MHz
200 ns
400 ns
800 ns
1.6 s
0
CHAPTER 10 WATCH TIMER FUNCTIONS
μ
0
BGCS01 BGCS00
BGCS
)
4 MHz
250 ns
500 ns
1 s
2 s
μ
μ
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