
FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
MB86277 MINT
Graphics Controller
225
Specifications Rev. 1.0
12 TIMING DIAGRAM
12.1
Host Interface
12.1.1
CPU read/write timing diagram in SH3 mode (Normally Not Ready
Mode)
( MODE[2:0]=000, RDY_MODE=0, BS_MODE=0)
T1:
Read/write start cycle (XRDY in wait state)
Tsw*: Software wait insertion cycle (1 cycle setting)
Thw*: Hardware wait insertion cycle (XRDY cancels the wait state after the preparations)
T2:
Read/write end cycle (XRDY ends in wait state)
Fig. 10.1
Read/Write Timing Diagram for SH3 (Normally Not Ready Mode)
BCLKI
A[24:2]
XCS
T1
Tsw1
Thw1
T2
T1
Tsw1
Thw1
Thw2
Thw3
T2
XBS
XRD
Hi-Z
D[31:0]
Valid Data
Hi-Z
XWE[3:0]
XWAIT
D[31:0]
Sof tWait HardWait NotWait
Hi-Z
SoftWait HardWait HardWait HardWait
Valid Data IN
Hi-Z
: XWAIT sampling in SH3 mode
×: Soft Wait (1 cycle) in SH3 mode
Not Wait
A
t
R
e
a
d
A
t
W
ri
te