Figure 6.12 Bus Timing For 16-Bit, 3-State Access Space (Word Access) - Renesas H8S/2158 User Manual

Section 6 Bus Controller
Address bus
AS/IOS (IOSE = 1)
CS256 (CS256E = 1)
CPCS1 (CPCSE = 1 and CFE = 0)
AS/IOS * (IOSE = 0)
Read
Write
Note: * For external address space access, this signal is not output when the 256-kbyte expansion area
is accessed with CS256E = 1 and when the CP/CF expansion area is accessed with CPCSE = 1.

Figure 6.12 Bus Timing for 16-Bit, 3-State Access Space (Word Access)

Rev. 3.00 Jan 25, 2006 page 132 of 872
REJ09B0286-0300
T
1
φ
RD
D15 to D8
D7 to D0
HWR
LWR
D15 to D8
D7 to D0
Bus cycle
T T
2 3
Valid
Valid
Valid
Valid