HD6432670 Hitachi, HD6432670 Datasheet - Page 210

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

16-Bit, 3-State Access Space: Figures 6.15 to 6.17 show bus timings for a 16-bit, 3-state access
space. When a 16-bit access space is accessed, the upper half (D15 to D8) of the data bus is used
for the even address, and the lower half (D7 to D0) for the odd address. Wait states can be
inserted.
Rev. 2.0, 04/02, page 164 of 906
Notes: 1. n = 0 to 7
Read
Write
2. When RDNn = 0
ø
Address bus
D15 to D8
D7 to D0
D15 to D8
D7 to D0
Figure 6.15 Bus Timing for 16-Bit, 3-State Access Space
(Even Address Byte Access)
T
1
High impedance
Bus cycle
High
T
2
Valid
T
3
Invalid
Valid