upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 290

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 7
290
Figure 7-16
A[23:0] (output)
7.6.4 Write-read operation on external devices
Note
CSk (output)
D[31:0] (I/O)
WAIT (input)
WR (output)
RD (output)
BCLK
Write-read operation
Register settings:
• BCTm.BTk0 = 0 (connected external device is SRAM or external I/O)
• ASC.ACk[1:0] = 00
• DWCm.DWk[2:0] = 000
• BCC.BCk[1:0] = 00
1.
2.
The data has to be stable at the rising edge of the WR signal. For details refer
to the Electrical Target Specification.
Preliminary User’s Manual U17566EE1V2UM00
The circles indicate the sampling timing.
The broken line indicates the high-impedance state (bus is not driven).
T1
B
B
(no address setup wait states inserted)
(no idle states inserted)
B
Data
(no programmable data wait states inserted)
T2
Address
Bus and Memory Control (BCU, MEMC)
T1
Data
T2