UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 627

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

Caution When the bus hold function is used, access wait control cannot be performed by means of the WAIT
PWC1
PWC2
pin, and 0, 1 or 2 waits must be selected for the entire space.
PW31 PW30 PW21 PW20
PW71 PW70 PW61 PW60
15
7
1
7
Figure 21-9 Programmable Wait Control Register (PWC1/PWC2) Format
14
6
0
6
13
5
1
5
(n = 0-3)
* Except portion overlapping the internal data area.
(n = 4-7)
* Except portion overlapping the internal data area.
(a) Programmable wait control register 1 (PWC1)
(b) Programmable wait control register 2 (PWC2)
CHAPTER 21 LOCAL BUS INTERFACE FUNCTION
PWn1
PWn1
12
4
0
4
Address subject to
insertion of wait cycle
Address subject to
insertion of wait cycle
0
0
1
1
0
0
1
1
PW11
PW51
11
3
1
3
PW10 PW01 PW00
PW50 PW41 PW40
PWn0
PWn0
10
2
0
2
0
1
0
1
0
1
0
1
1
9
1
1
No access wait cycle inserted
1 access wait cycle inserted
2 access wait cycles inserted
Access wait cycles equivalent to low-level time input to
WAIT pin inserted
No access wait cycle inserted
1 access wait cycle inserted
2 access wait cycles inserted
Access wait cycles equivalent to low-level time input to
WAIT pin inserted
080000H-
0FFFFFH
00C000H-
00FFFFH
0
8
0
0
*
*
0FFC7H
0FFC8H
Address
Address
008000H-
00BFFFH
040000H-
07FFFFH
On reset
On reset
AAAAH
AAH
004000H-
007FFFH
020000H-
03FFFFH
R/W
R/W
R/W
R/W
000000H-
003FFFH
010000H-
01FFFFH
587