UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 590

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

18.3 Register Controlling Key Interrupt
590
(1) Key return mode register (KRM)
(1) 44-pin products
(2) 48-pin products
Cautions 1. If any of the KRMn bits used is set to 1, set bit n (PU7n) of the corresponding pull-up
Remark n = 0 to 3: 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.
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
3. The bits not used in the key interrupt mode can be used as normal ports.
4. For the 44-pin products of 78K0/KC2-L, be sure to set bits 4 to 7 of KRM to “0”. For the 48-
Symbol
Symbol
Address: FF6EH
Address: FF6EH
KRM
KRM
resistor register 7 (PU7) to 1.
then 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”.
Figure 18-2. Format of Key Return Mode Register (KRM) (78K0/KC2-L)
KRMn
0
1
7
7
0
0
Does not detect key interrupt signal
Detects key interrupt signal
After reset: 00H
After reset: 00H
CHAPTER 18 KEY INTERRUPT FUNCTION
0
0
6
6
Preliminary User’s Manual U19111EJ2V1UD
KRM5
5
0
5
R/W
R/W
KRM4
Key interrupt mode control
4
0
4
KRM3
KRM3
3
3
KRM2
KRM2
2
2
KRM1
KRM1
KRM0
KRM0
0
0