M37544G2AGP#U0 Renesas Electronics America, M37544G2AGP#U0 Datasheet - Page 39

• Manufacturer Part Number: M37544G2AGP#U0
• Description: IC 740 MCU OTP 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M37544G2AGP#U0

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SIO, UART/USART
• Peripherals: WDT
• Number Of I /o: 25
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: QzROM
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

REJ03B0108-0103
page 37 of 72
7544 Group (QzROM version)
Fig. 36 Block diagram of watchdog timer
Fig. 37 Structure of watchdog timer control register
On-chip oscillator
X
Source clock selection
(auto-switch depending on setting of CPUM)
IN
clock
b7
Rev.1.03
STP Instruction function selection bit
RESET
Mar 31, 2009
Write “FF
watchdog timer
control register
STP Instruction
1/16
b0
16
” to the
Watchdog timer control register
(WDTCON: address 0039
STP instruction function selection bit
0 : System enters into the stop mode
1 : Internal reset occurs at the STP instruction execution
Watchdog timer H (read only for high-order 6-bit)
Watchdog timer H count source selection bit
0 : Watchdog timer L underflow
1 : f(X
Watchdog timer L (8)
at the STP instruction execution
IN
)/16 or on-chip oscillator/16
“0”
“1”
Watchdog timer H count
source selection bit
16
, initial value: 3F
Watchdog timer H (8)
Reset
circuit
16
)
Data bus
Internal
reset
Write "FF
watchdog timer
control register
16
" to the