Tap timing and test conditions, Identification register definitions, Tap ac switching characteristics – Cypress CY7C1302DV25 User Manual
Page 10

CY7C1302DV25
Document #: 38-05625 Rev. *A
Page 10 of 18
Output Times
t
TDOV
TCK Clock LOW to TDO Valid
20
ns
t
TDOX
TCK Clock LOW to TDO Invalid
0
ns
TAP Timing and Test Conditions
[12]
Identification Register Definitions
Instruction Field
Value
Description
CY7C1302DV25
Revision Number (31:29)
000
Version number.
Cypress Device ID (28:12)
01011010010010110
Defines the type of SRAM.
Cypress JEDEC ID (11:1)
00000110100
Allows unique identification of SRAM vendor.
ID Register Presence (0)
1
Indicate the presence of an ID register.
TAP AC Switching Characteristics
Over the Operating Range (continued)
[11, 12]
Parameter
Description
Min.
Max.
Unit
(a)
TDO
C
L
= 20 pF
Z
0
= 50
Ω
GND
1.25V
Test Clock
Test Mode Select
TCK
TMS
Test Data-In
TDI
Test Data-Out
TDO
t
TCYC
t
TMSH
t
TL
t
TH
t
TMSS
t
TDIS
t
TDIH
t
TDOX
t
TDOV
50
Ω
2.5V
0V
ALL INPUT PULSES
1.25V
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