M3087BFLBGP#U5 Renesas Electronics America, M3087BFLBGP#U5 Datasheet - Page 161

• Manufacturer Part Number: M3087BFLBGP#U5
• Description: IC M32C/87 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M32C/80r

Specifications of M3087BFLBGP#U5

• Core Processor: M32C/80
• Core Size: 16/32-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IEBus, IrDA, SIO, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 121
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 34x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 144-LQFP
• For Use With: R0K330879S001BE - KIT DEV RSK M32C/87R0K330879S000BE - KIT DEV RSK M32C/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ09B0180-0151 Rev.1.51 Jul 31, 2008
Page 137 of 587
Figure 12.3
Watchdog Timer Control Register
Watchdog Timer Start Register
b7
b7
b6 b5 b4
0
NOTES:
1. The WDC5 bit is 0 after power-on. It can be set to 1 only by a program. The bit becomes 1 by writing either a 0 or 1.
The bit maintains a value set before reset, even after reset has been performed.
b3
WDC Register, WDTS Register
b2
b1
b0
b0
The counter is initialized and starts decrementing by a write instruction to the WDTS register.
7FFFh is the default value after initialization no matter what value is written.
Bit Symbol
(b4-b0)
WDC5
WDC7
(b6)
Symbol
WDC
Symbol
WDTS
−
−
High-order bits of watchdog timer
Cold start/warm start determine
flag
Reserved bit
Prescaler select bit
(1)
Bit Name
Address
000Fh
Address
000Eh
Function
0: Cold start
1: Warm start
Set to 0
0: Divide-by-16
1: Divide-by-128
Function
After Reset
00XX XXXXb
Address
Undefined
12. Watchdog Timer
WO
RW
RW
RW
RW
RW
RO