UPD30181 Datasheet, PDF (345/444 Pages) NEC – 64-/32-Bit Microprocessor

CHAPTER 17 COMPACTFLASH CONTROLLER (ECU)
17.4.15 SYSMEMELnREG (Index: 0x12, 0x1A, 0x22, 0x2A, 0x32)
Remark
n = 0 to 4
SYSMEMEL0REG (0x12): for Window 0
SYSMEMEL1REG (0x1A): for Window 1
SYSMEMEL2REG (0x22): for Window 2
SYSMEMEL3REG (0x2A): for Window 3
SYSMEMEL4REG (0x32): for Window 4
Bit
Name
R/W
Reset
7
6
5
4
3
2
1
0
MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA
19
18
17
16
15
14
13
12
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
Bit
7 to 0
Name
MWSTOPA(19:12)
Function
Memory window stop address bits 19 to 12
Low-order address bits used to determine the stop address of a memory address window.
17.4.16 MEMSELn_REG (Index: 0x13, 0x1B, 0x23, 0x2B, 0x33)
Remark
n = 0 to 4
MEMSEL0_REG (0x13): for Window 0
MEMSEL1_REG (0x1B): for Window 1
MEMSEL2_REG (0x23): for Window 2
MEMSEL3_REG (0x2B): for Window 3
MEMSEL4_REG (0x33): for Window 4
Bit
Name
R/W
Reset
7
M16W1
R/W
0
6
M16W0
R/W
0
5
4
3
2
1
0
MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA MWSTOPA
25
24
23
22
21
20
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
Bit
7, 6
Name
M16W(1:0)
5 to 0
MWSTOPA(25:20)
Function
Memory window wait state select for 16-bit accesses
00 : No additional wait state
01 : 2 additional wait states
10 : 3 additional wait states
11 : 4 additional wait states
Memory window stop address bits 25 to 20
The ECU automatically inserts wait states when memory windows are accessed in 16-bit width.
User’s Manual U14272EJ3V0UM
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