ia186em Innovasic Semiconductor Inc., ia186em Datasheet - Page 116

• Manufacturer Part Number: ia186em
• Description: 8-bit/16-bit Microcontrollers
• Manufacturer: Innovasic Semiconductor Inc.

IA186EM/IA188EM
8-Bit/16-Bit Microcontrollers
Table 87. PSRAM Refresh Cycle
a
In nanoseconds.
No.
General Timing Requirements
1
2
General Timing Responses
9
10
11
Read/Write Cycle Timing Responses
25
26
27
28
80
81
Refresh Cycle Timing Responses
79
82
85
86
tDVCL
tCLDX
tCHLH
tLHLL
tCHLL
tCLRL
tRLRH
tCLRH
tRHLH
tCLCLX
tCLCSL
tCHRFD
tCLRF
tRFCY
tLCRF
clkouta
a19–a0
Name
rfsh_n
lcs_n
rd_n
ale
C L K 0
a 1 9 - a 0
a l e
r d _ n
r f s h _
0ns
Data in Setup
Data in Hold
ale Active Delay
ale Width
ale Inactive Delay
rd_n Active Delay
rd_n Pulse Width
rd_n Inactive Delay
rd_n Inactive to ale High
lcs_n Inactive Delay
lcs_n Active Delay
clkouta High to rfsh_n Valid
clkouta High to rfsh_n Invalid
rfsh_n Cycle Time
lcs_n Inactive to rfsh_n Active Delay
80
®
27
20ns
9
86
Comment
40ns
10
Figure 17. PSRAM Refresh Cycle
11
60ns
UNCONTROLLED WHEN PRINTED OR COPIED
79
25
Address
Address
80ns
Page 116 of 145
IA211050831-16
26
85
100ns
tCLCH-5
6tCLCL
2tCLCL
tCLCH
tCLCL
Min
82
10
0
0
0
0
0
0
0
0
0
a
27
120ns
28
NULL
Max
10
10
12
12
–
–
8
–
8
–
–
9
9
–
a
140ns
81
160ns
December 24, 2008
http://www.Innovasic.com
180ns
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