upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 221

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

5.5.4 Programmable address wait function
Address-setup or address-hold waits to be inserted in each bus cycle can be set by using the address
wait control register (AWC). Address wait insertion is set for each chip select area (CS0, CS1).
If an address setup wait is inserted, it seems that the high-clock period of T1 state is extended by
1 clock. If an address hold wait is inserted, it seems that the low-clock period of T1 state is extended by
1 clock.
(1)
Caution:
Symbol
AWC
R/W
CSn
Address wait control register (AWC)
This register can be read or written in 16-bit units.
signal
Be sure to set bits 15 to 4 to 1.
15
1
7
1
AHWn
ASWn
0
1
0
1
Figure 5-6: Address Wait Control Register (AWC) Format
14
1
6
1
Not inserted
Inserted
8 bits
16 bits
13
1
5
1
User’s Manual U16702EE3V2UD00
Chapter 5 Bus Control Function
Specifies insertion of address hold wait (n = 0, 1)
Specifies insertion of address hold wait (n = 0, 1)
12
1
4
1
AHW1
I_________I
11
1
3
CS1
ASW1
10
1
2
AHW0
I_________I
9
1
1
CS0
ASW0
8
1
0
FFFFF488H
Address
After reset
FFFFH
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