87C196 Intel Corporation, 87C196 Datasheet - Page 16

• Manufacturer Part Number: 87C196
• Description: CHMOS 16-BIT MICROCONTROLLER
• Manufacturer: Intel Corporation

87C196CA 87C196CB
AC CHARACTERISTICS
Test Conditions Capacitance Load on All Pins
The 87C196CA CB will meet these specifications
NOTES
1 Testing performed at 4 0 MHz however the device is static by design and will typically operate below 1 Hz
2 Typical specifications not guaranteed
3 Assuming back-to-back bus cycles
4 8-bit bus only
5 If wait states are used add 2 Tosc
6 T
16
operation is selected add 2 T
programming the UPROM location 0778H with the value 0004H Programming the CDE bit enables oscillator fail detec-
tion
OFD
Symbol
F
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
XTAL
OSC
XHCH
OFD
CLCL
CHCL
CLLH
LLCH
LHLH
LHLL
AVLL
LLAX
LLRL
RLCL
RLRH
RHLH
RLAZ
LLWL
CLWL
QVWH
CHWH
WLWH
WHQX
WHLH
WHBX
WHAX
RHBX
RHAX
is the time for the oscillator fail detect circuit (OFD) to react to a clock failure The OFD circuitry is enabled by
Frequency on XTAL1
XTAL1 Period (1 F
XTAL1 High to CLKOUT High or Low
Clock Failure to Reset Pulled Low
CLKOUT Period
CLKOUT High Period
CLKOUT Low to ALE ADV High
ALE ADV Low to CLKOUT High
ALE ADV Cycle Time
ALE ADV High Time
Address Valid to ALE Low
Address Hold After ALE ADV Low
ALE ADV Low to RD Low
RD Low to CLKOUT Low
RD Low Period
RD High to ALE ADV High
RD Low to Address Float
ALE ADV Low to WR Low
CLKOUT Low to WR Low
Data Valid before WR High
CLKOUT High to WR High
WR Low Period
Data Hold after WR High
WR High to ALE ADV High
BHE INST Hold after WR High
AD8–15 Hold after WR High
BHE INST Hold after RD High
AD8–15 Hold after RD High
OSC
Parameter
(Over Specified Operating Conditions)
to specification
c
n where n
XTAL
)
e
e
number of wait states If mode 0 (1 automatic wait state added)
(6)
CA
CB
CB
CA
100 pF Rise and Fall Times
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
OSC
T
50 0
a
b
b
b
Min
a
b
b
4 0
OSC
4
20
15
20
10
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
b
4
8
5
10
10
15
40
30
10
10
23
30
20
25
10
10
30
10
30
2 T
4 T
OSC
OSC
T
T
T
T
e
OSC
OSC
OSC
OSC
a
a
a
a
a
a
Max
10 ns
250
110
20
40
5
10
15
30
20
25
15
a
a
a
a
15
10
25
15
MHz
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
(5)
(5)
(3)
(5)
(3)
(4)
(4)
s
(1)