M37544G2AGP#U0 Renesas Electronics America, M37544G2AGP#U0 Datasheet - Page 27

• 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 25 of 72
7544 Group (QzROM version)
Key Input Interrupt (Key-On Wake-Up)
A key-on wake-up interrupt request is generated by applying “L”
level to any pin of port P0 that has been set to input mode.
In other words, it is generated when the AND of input level goes
from “1” to “0”. An example of using a key input interrupt is shown
in Fig. 22, where an interrupt request is generated by pressing
one of the keys provided as an active-low key matrix which uses
ports P0
Fig. 22 Connection example when using key input interrupt and port P0 block diagram
0
to P0
3
as input ports.
Rev.1.03
P0
P0
P0
P0
P0
P0
P0
P0
7
6
5
4
output
output
output
output
3
2
1
0
input
input
input
input
Mar 31, 2009
Port PXx
“L” level output
Port P0
selection bit
*
*
*
*
*
*
*
*
0
PULL register
bit 3 = “0”
PULL register
bit 3 = “0”
PULL register
bit 3 = “0”
PULL register
bit 3 = “0”
PULL register
bit 2 = “1”
PULL register
bit 2 = “1”
PULL register
bit 1 = “1”
PULL register
bit 0 = “1”
key-on wakeup
**
**
**
**
**
**
**
**
Port P0
latch
Port P0
latch
Port P0
latch
Port P0
latch
Port P0
latch
Port P0
latch
Port P0
latch
Port P0
latch
7
6
5
4
3
2
1
0
Port P0
Direction register = “1”
Port P0
Direction register = “1”
Port P0
Direction register = “1”
Port P0
Direction register = “1”
Port P0
Direction register = “0”
Port P0
Direction register = “0”
Port P0
Direction register = “0”
Port P0
Direction register = “0”
7
6
5
4
3
2
1
0
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
Falling edge
detection
** CMOS output buffer
* P-channel transistor for pull-up
Key input interrupt request
Port P0
Input read circuit