UPD78F0552MA-FAA-AX Renesas Electronics America, UPD78F0552MA-FAA-AX Datasheet - Page 652

• Manufacturer Part Number: UPD78F0552MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0552MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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78K0/Kx2-L
18.3 Register Controlling Key Interrupt
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
(1) Key return mode register (KRM)
Cautions 1. If any of the KRMn bits used is set to 1, set bit n (PU7n) of the corresponding pull-up resistor
Remark n = 0 to 3: 40-pin and 44-pin products of 78K0/KC2-L
This register controls the KRMn bit using the KRn signal.
KRM is set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears KRM to 00H.
(a) 40-pin and 44-pin products
(b) 48-pin products
n = 0 to 5: 48-pin products of 78K0/KC2-L
2. If KRM is changed, the interrupt request flag may be set. Therefore, disable interrupts and then
3. The bits not used in the key interrupt mode can be used as normal ports.
4. For the 40, 44-pin products of 78K0/KC2-L, be sure to set bits 4 to 7 of KRM to “0”. For the 48-
Symbol
Symbol
register 7 (PU7) to 1.
change the KRM register. Clear the interrupt request flag and enable interrupts.
pin products of 78K0/KC2-L, be sure to set bits 6 and 7 of KRM to “0”.
Address: FF6EH
Address: FF6EH
KRM
KRM
Figure 18-2. Format of Key Return Mode Register (KRM) (78K0/KC2-L)
KRMn
0
1
7
0
7
0
Does not detect key interrupt signal
Detects key interrupt signal
After reset: 00H
After reset: 00H
6
0
6
0
KRM5
5
0
5
R/W
R/W
KRM4
Key interrupt mode control
4
0
4
KRM3
KRM3
CHAPTER 18 KEY INTERRUPT FUNCTION
3
3
KRM2
KRM2
2
2
KRM1
KRM1
KRM0
KRM0
0
0
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