UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 67

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(8) P70 to P77 (Port 7) ... 3-state input/output
(9) ASTB (Address Strobe)/CLKOUT (Clock Output) ... Output
(10) X1, X2 (Crystal)
(11) RESET (Reset) ... Input
(12) ANO0, ANO1 ... Output
(13) AV
(14) AV
(15) AV
(16) AV
(17) AV
(18) V
(19) V
(20) TEST
Port 7 is an 8-bit input/output port. In addition to operating as an input/output port, it also operates as the A/D converter
analog input pins (ANI0 to ANI7).
Input/output can be specified bit-wise by means of the port 7 mode register (PM7).
The levels of these pins can always be read or tested, regardless of the operation of the multiplexed pins.
When RESET is input, port 7 is set as an input port (output high-impedance state), and the output latch contents are
undefined.
This pin outputs the timing signal that latches address information externally in order to access an external address. It also
operates as the pin that supplies the clock to an external device.
The internal clock oscillation crystal connection pins. When the clock is supplied externally, it is input to the X1pin. Usually
signal with the inverse phase of the X1 pin signal phase is input to the X2 pin (see 4.3.1 Clock oscillation circuit).
The active-low reset input.
The D/A converter analog voltage output pins.
The A/D converter reference voltage input pin.
The D/A converter reference voltage input (+ side) pin.
The D/A converter reference voltage input (– side) pin.
The A/D converter power supply pin. This should be made at the same potential as the V
The A/D converter GND pin. This should be made at the same potential as the V
Positive power supply pins. All V
GND potential pins. All V
Pin used by NEC for IC testing. Must be directly connected to V
DD
SS
REF1
REF2
REF3
DD
SS
SS
pins should be connected to ground.
DD
pins should be connected to the positive power supply.
CHAPTER 2 PIN FUNCTIONS
SS
.
SS
pin.
DD
pin.
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