upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 287

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

Bus and Memory Control (BCU, MEMC)
Figure 7-13
A[23:0] (output)
CSk (output)
WAIT (input)
D[31:0] (I/O)
WR (output)
RD (output)
7.6.2 Reading from external devices
Note
BCLK
(1)
This section shows typical sequences of reading data from external devices.
Read with external wait cycle
Timing: read data
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.
Preliminary User’s Manual U17566EE1V2UM00
The circles indicate the sampling timing.
The broken line indicates the high-impedance state (bus is not driven).
T1
Address
Data
B
B
T2
(no address setup wait states inserted)
(no idle states inserted)
B
(no programmable data wait states inserted)
T1
Address
TW
Data
T2
Chapter 7
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