UPD784044 Datasheet, PDF (15/90 Pages) NEC – 16-BIT SINGLE-CHIP MICROCONTROLLER

µPD784044(A), 784046(A)
5.2 Pins Other Than Port Pins (2/2)
Pin Name
LWR
HWR
ASTB
WAIT
BWD
MODE
CLKOUT
X1
X2
RESET
ANI0-ANI7
ANI8-ANI15
AVREF
AVDD
AVSS
VDD
VSS
I/O
Shared by:
Output P91
P92
Output P93
Input P94
Input
–
Input
–
Output
–
Input
–
Input
Input
–
–
–
–
P70-P77
P80-P87
–
–
–
–
–
Function
• When external 8-bit bus is specified
Write strobe to external memory
• When external 16-bit bus is specified
Write strobe to external memory located at lower position
Write strobe to external memory located at higher position when external
16-bit bus is specified
Timing signal output to externally latch address information output from
AD0 through AD15 pins to access external memory
Inserts wait.
Sets bus width.
Directly connect this pin to VSS (this pin specifies test mode of IC).
Clock output. Outputs low level during IDLE mode and STOP mode.
Otherwise, always outputs fXX (oscillation frequency).
Connect crystal for system clock oscillation (clock can be also input to X1).
Chip reset
Analog voltage input for A/D converter
Reference voltage for A/D converter
Positive power supply for A/D converter
GND for A/D converter
Positive power supply
GND
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