HD6432670 Hitachi, HD6432670 Datasheet - Page 206

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

8-Bit, 3-State Access Space: Figure 6.11 shows the bus timing for an 8-bit, 3-state access space.
When an 8-bit access space is accessed, the upper half (D15 to D8) of the data bus is used. The
/:5 pin is always fixed high. Wait states can be inserted.
Rev. 2.0, 04/02, page 160 of 906
Notes: 1. n = 0 to 7
Read
Write
2. When RDNn = 0
Address bus
D15 to D8
D7 to D0
D15 to D8
D7 to D0
ø
Figure 6.11 Bus Timing for 8-Bit, 3-State Access Space
T
1
High impedance
Bus cycle
High
T
2
Valid
T
3
Invalid
Valid