83C576 Datasheet, PDF (34/46 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,
failure detect circuitry, watchdog timer
UPI AC ELECTRICAL CHARACTERISTICS
T_amb = 0°C to +70°C, –40°C to +85°C, and –40°C to +125°C; V_CC = 5V ±10%, V_SS = 0V
SYMBOL
PARAMETER
MIN
t_AR
CS, A setup to RD
0
t_RA
CS, A hold after RD
35
t_RR
RD pulse width
35
t_AD
CS, A to data out delay
t_RD
RD to data out delay
t_DF
RD to data float delay (guaranteed by design)
t_AW
CS, A setup to WR
0
t_WA
CS, A hold after WR
15
t_WW
WR pulse width
45
t_DW
Data setup to WR
5
t_WD
Data hold after WR
25
Product specification
83C576/87C576
MAX
45
35
30
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The first character is always
‘t’ (= time). The other characters, depending on their positions,
indicate the name of a signal or the logical status of that signal.
The designations are:
A – Address
C – Clock
D – Input data
H – Logic level high
I – Instruction (program memory contents)
L – Logic level low, or ALE
P – PSEN
Q – Output data
R – RD signal
t – Time
V – Valid
W – WR signal
X – No longer a valid logic level
Z – Float
Examples: t_AVLL = Time for address valid to ALE low.
t_LLPL =Time for ALE low to PSEN low.
ALE
PSEN
PORT 0
PORT 2
t_LHLL
t_AVLL
t_LLPL
t_PLPH
t_LLIV
t_PLIV
t_LLAX
t_PLAZ
t_PXIX
t_PXIZ
A0–A7
INSTR IN
t_AVIV
A0–A15
A0–A7
A8–A15
Figure 25. External Program Memory Read Cycle
SU00006
1998 Jun 04
34