UPD70F3740GC-UEU-AX Renesas Electronics America, UPD70F3740GC-UEU-AX Datasheet - Page 688

• Manufacturer Part Number: UPD70F3740GC-UEU-AX
• Description: MCU 32BIT V850ES/JX3 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3r

Specifications of UPD70F3740GC-UEU-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

V850ES/JG3
20.2 Register
20.3 Cautions
R01UH0015EJ0300 Rev.3.00
Sep 30, 2010
(1) Key return mode register (KRM)
(1) If a low level is input to any of the KR0 to KR7 pins, the INTKR signal is not generated even if the falling edge of
(2) The RXDA1 and KR7 pins must not be used at the same time. To use the RXDA1 pin, do not use the KR7 pin. To
(3) If the KRM register is changed, an interrupt request signal (INTKR) may be generated. To prevent this, change the
(4) To use the key interrupt function, be sure to set the port pin to the key return pin and then enable the operation
The KRM register controls the KRM0 to KRM7 bits using the KR0 to KR7 signals.
This register can be read or written in 8-bit or 1-bit units.
Reset sets this register to 00H.
another pin is input.
use the KR7 pin, do not use the RXDA1 pin (it is recommended to set the PFC91 bit to 1 and clear PFCE91 bit to
0).
KRM register after disabling interrupts (DI) or masking, then clear the interrupt request flag (KRIC.KRIF bit) to 0,
and enable interrupts (EI) or clear the mask.
with the KRM register. To switch from the key return pin to the port pin, disable the operation with the KRM
register and then set the port pin.
After reset: 00H
KRM
Caution Rewrite the KRM register after once clearing the KRM register to 00H.
Remark For the alternate-function pin settings, see Table 4-15 Using Port Pin as Alternate-
KRMn
KRM7
Function Pin.
0
1
Does not detect key return signal
Detects key return signal
R/W
KRM6
Address: FFFFF300H
KRM5
KRM4
Control of key return mode
KRM3
CHAPTER 20 KEY INTERRUPT FUNCTION
KRM2
KRM1
KRM0
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