UPD70F3218 Datasheet, PDF (205/884 Pages) NEC – 32-Bit Single-Chip Microcontrollers

CHAPTER 5 BUS CONTROL FUNCTION
Figure 5-11. Separate Bus Write Timing (Bus Size: 16 Bits, 16-Bit Access)
CLKOUT
CS3 to CS0
WAIT
A23 to A0
WR1, WR0
AD15 to AD0
T1
T2
A1
11
00
11
D1
T1
TW
TW
T2
T1
T2
A2
A3
11
00
11
00
11
D2
D3
8-bit access
AD15 to AD8
AD7 to AD0
WR1, WR0
Odd address
Active
Undefined
01
Programmable External
wait
wait
Even address
Undefined
Active
10
Remark The broken lines indicate high impedance.
Figure 5-12. Separate Bus Write Timing (Bus Size: 8 Bits)
CLKOUT
CS3 to CS0
WAIT
A23 to A0
WR1, WR0
AD7 to AD0
T1
T2
A1
11
10
11
D1
T1
TW
TW
T2
T1
T2
A2
A3
11
10
11
10
11
D2
D3
Programmable External
wait
wait
Remark The broken lines indicate high impedance.
User’s Manual U16889EJ1V0UD
205