DS2250_1 Datasheet, PDF (16/19 Pages) Dallas Semiconductor – Soft Microcontroller Module

DS2250(T)
AC CHARACTERISTICS (cont’d)
PARALLEL PROGRAM LOAD TIMING
# PARAMETER
SYMBOL
(t_A = 0°C to70°C; V_CC = 5V + 5%)
MIN
MAX
UNITS
40 Oscillator Frequency
41 Address Setup to PROG Low
42 Address Hold after PROG High
43 Data Setup to PROG Low
44 Data Hold after PROG High
45 P2.7, 2.6, 2.5 Setup to V_PP
46 V_PP Setup to PROG Low
47 V_PP Hold after PROG Low
48 PROG Width Low
49 Data Output from Address Valid
1/t_CLK
t_AVPRL
t_PRHAV
t_DVPRL
t_PRHDV
t_P27HVP
t_VPHPRL
t_PRHVPL
t_PRW
t_AVDV
1.0
0
0
0
0
0
0
0
2400
12.0
48
1800*
MHz
t_CLK
t_CLK
50 Data Output from P2.7 Low
51 Data Float after P2.7 High
t_DVP27L
48
t_CLK
1800*
t_P27HDZ
0
48
t_CLK
1800*
52 Delay to Reset/PSEN Active after
t_PORPV
21504
t_CLK
Power On
53 Reset/PSEN Active (or Verify Inactive) to
t_RAVPH
1200
t_CLK
V_PP High
54 V_PP Inactive (Between Program Cycles)
t_VPPPC
1200
t_CLK
55 Verify Active Time
t_VFT
48
2400*
t_CLK
* Second set of numbers refers to expanded memory programming up to 32K bytes.
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