NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
174
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497
Rev 1.00
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External Bus Interface Timing Control Register (EXTIME)
Register
Offset
R/W
Description
Reset Value
EXTIME
0x04
R/W
External Bus Interface Timing Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
ExtIR2R
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
ExtIW2X
Reserved
ExttAHD
7
6
5
4
3
2
1
0
ExttACC
Reserved
Bits
Description
[31:28]
Reserved
Reserved
[27:24]
ExtIR2R
Idle State Cycle Between Read-Read
When read action is finished and the next action is going to read, idle state is inserted
and nCS signal return to high if ExtIR2R is not zero.
Idle state cycle = (ExtIR2R*MCLK)
[23:16]
Reserved
Reserved
[15:12]
ExtIW2X
Idle State Cycle After Write
When write action is finished, idle state is inserted and nCS signal return to high if
ExtIW2X is not zero.
Idle state cycle = (ExtIW2X*MCLK)
[11]
Reserved
Reserved
[10:8]
ExttAHD
EBI Data Access Hold Time
ExttAHD defines data access hold time (tAHD).
tAHD = (E1) * MCLK
[7:3]
ExttACC
EBI Data Access Time
ExttACC defines data access time (tACC).
tACC = (E1) * MCLK
[2:0]
Reserved
Reserved