82C52 Datasheet, PDF (13/20 Pages) Intersil Corporation – CMOS Serial Controller Interface

Timing Waveform
CS0, A0, A1
WR
WRITE
OPERATION
D0-D7
RD
READ
OPERATION
D0-D7
AC Test Circuit
OUTPUT FROM
DEVICE UNDER
TEST
CL
82C52
(1)
TSVCTL
SELECT VALID
(3)
TCTLCTH
(2)
TCTHSX
NEXT BUS CYCLE
(1)
TSVCTL
(7)
TDVWH
(8)
TWHDX
VALID
(3)
TCTLCTH
(4)
TCTHCTL
(5)
TRLDV
(6)
TRHDZ
FIGURE 14. BUS OPERATION
V1
R1
TEST POINT
R2
TEST CONDITION
V1
R1
1 Propagation Delay 1.7V
520
2 Disable Delay
V_CC
5K
R2
CL
∞ ^100pF
5K
50pF
13
FN2950.3
April 26, 2006