w77e58 Winbond Electronics Corp America, w77e58 Datasheet - Page 77

• Manufacturer Part Number: w77e58
• Description: 8 Bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Notes:*1. RST pin is a Schmitt trigger input.
AC ELECTRICAL CHARACTERISTICS
Note: Duty cycle is 50%.
EXTERNAL CLOCK CHARACTERISTICS
AC SPECIFICATION
Clock High Time
Clock Low Time
Clock Rise Time
Clock Fall Time
Oscillator Frequency
ALE Pulse Width
Address Valid to ALE Low
Address Hold After ALE Low
Address Hold After ALE Low for
MOVX Write
ALE Low to Valid Instruction In
ALE Low to PSEN Low
PSEN Pulse Width
*2. P0, ALE and PSEN are tested in the external access mode.
*3. XTAL1 is a CMOS input.
*4. Pins of P1, P2, P3 can source a transition current when they are being externally driven from 1 to 0. The transition
PARAMETER
current reaches its maximum value when VIN approximates to 2V.
PARAMETER
t
t
t
t
SYMBOL
CHCX
CLCX
CLCH
CHCL
t
CHCL
1/t
t
t
t
t
t
t
t
SYMBOL
LHLL
AVLL
LLAX1
LLAX2
LLIV
LLPL
PLPH
MIN.
12.5
12.5
CLCL
-
-
- 77 -
t
t
CLCH
CLCX
TYP
-
-
-
-
VARIABLE
t
1.5t
0.5t
0.5t
0.5t
0.5t
2.0t
CLCL
CLOCK
MIN
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
0
t
CHCX
Preliminary W77E58
Publication Release Date: March 1999
- 5
- 5
- 5
- 5
- 5
- 5
MAX.
10
10
-
-
2.5t
VARIABLE
CLOCK
MAX
CLCL
UNITS
40
ns
ns
ns
ns
- 20
Revision A1
NOTES
UNITS
MHz
nS
nS
nS
nS
nS
nS
nS