M30262F8GP#U7 Renesas Electronics America, M30262F8GP#U7 Datasheet - Page 73

• Manufacturer Part Number: M30262F8GP#U7
• Description: IC M16C/TINY MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/26r

Specifications of M30262F8GP#U7

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Watchdog Timer
Figure 1.10.2. Watchdog timer control and start registers
Figure 1.10.1. Block diagram of watchdog timer
Write to the watchdog timer
start register
(address 000E
HOLD
RESET
BCLK
Note 1: The WDC5 bit is set to 0 immediately after power-on (cold start).
Note 2: The WDC5 bit will always be set to a 1 whenever the WDC SFR is written (regardless of value of WDC5 bit).
b7
Watchdog timer control register
b7
Watchdog timer start register
Preliminary Specifications Rev. 0.9
b6
0
Specifications in this manual are tentative and subject to change.
b5
16
)
b4 b3
b2
b1
b0
b0
Prescaler
1/128
The watchdog timer is initialized and starts counting after a write instruction to
this register. The watchdog timer value is always initialized to 7FFF
regardless of whatever value is written.
1/16
Bit symbol
1/2
High-order bit of watchdog timer
WDC5
WDC7
Symbol
Symbol
WDC
WDTS
CM07 = 0
WDC7 = 1
CM07 = 1
CM07 = 0
WDC7 = 0
Renesas Technology Corp.
Cold start / warm start
discrimination flag (Note 2)
Reserved bit
Prescaler select bit
Bit name
Address
Address
000F
000E
16
16
Function
Watchdog timer
00?XXXXX
Indeterminate
0 : Cold start
1 : Warm start
When reset
Set to 0
0 : Divided by 16
1 : Divided by 128
After reset
Set to
7FFF
2
(Note1)
16
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
16
PM12 = 0
PM12 = 1
Watchdog timer
interrupt request
R
RW
RW
RW
Reset
RO
RW
M16C/26 Group
W
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