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PDF W78L32P-24 Data sheet ( Hoja de datos )
| Número de pieza | W78L32P-24 | |
| Descripción | 8-BIT MICROCONTROLLER | |
| Fabricantes | Winbond | |
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W78L32/W78L032A/W78M032A
8-BIT MICROCONTROLLER
Table of Content-
1. GENERAL DESCRIPTION ......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. PIN CONFIGURATIONS ............................................................................................................ 3
4. PIN DESCRIPTION..................................................................................................................... 4
5. BLOCK DIAGRAM ...................................................................................................................... 6
6. FUNCTIONAL DESCRIPTION ................................................................................................... 7
7. ABSOLUTE MAXIMUM RATINGS ............................................................................................. 8
8. DC CHARACTERISTICS............................................................................................................ 8
9. AC CHARACTERISTICS .......................................................................................................... 10
10. TIMING WAVEFORMS ............................................................................................................. 12
11. TYPICAL APPLICATION CIRCUITS ........................................................................................ 14
12. PACKAGE DIMENSIONS ......................................................................................................... 16
13. REVISION HISTORY ................................................................................................................ 18
Publication Release Date: March 7, 2006
- 1 - Revision A5
1 page  
W78L32/W78L032A/W78M032A
PSEN
Program Store Enable Output, active low. PSEN enables the external ROM onto the Port 0
address/data bus during fetch and MOVC operations. PSEN goes to a high state during reset with a
weak pull-up.
XTAL1
Crystal 1. This is the crystal oscillator input. This pin may be driven by an external clock.
XTAL2
Crystal 2. This is the crystal oscillator output. It is the inversion of XTAL1.
VSS, VDD
Power Supplies. These are the chip ground and positive supplies.
Publication Release Date: March 7, 2006
- 5 - Revision A5
5 Page 
W78L32/W78L032A/W78M032A
Data Read Cycle
PARAMETER
ALE Low to RD Low
RD Low to Data Valid
Data Hold after RD High
Data Float after RD High
RD Pulse Width
SYMBOL
TDAR
TDDA
TDDH
TDDZ
TDRD
MIN.
3 TCP-∆
-
0
0
6 TCP-∆
Notes:
1. Data memory access time is 8 TCP.
2. "∆" (due to buffer driving delay and wire loading) is 20 nS.
TYP.
-
-
-
-
6 TCP
MAX.
3 TCP+∆
4 TCP
2 TCP
2 TCP
-
UNIT
nS
nS
nS
nS
nS
NOTES
1, 2
1
2
Data Write Cycle
PARAMETER
ALE Low to WR Low
Data Valid to WR Low
Data Hold from WR High
WR Pulse Width
SYMBOL
TDAW
TDAD
TDWD
TDWR
Note: "∆" (due to buffer driving delay and wire loading) is 20 nS.
MIN.
3 TCP-∆
1 TCP-∆
1 TCP-∆
6 TCP-∆
TYP.
-
-
-
6 TCP
MAX.
3 TCP+∆
-
-
-
UNIT
nS
nS
nS
nS
Port Access Cycle
PARAMETER
Port Input Setup to ALE Low
Port Input Hold from ALE Low
Port Output to ALE
SYMBOL
TPDS
TPDH
TPDA
MIN.
1 TCP
0
1 TCP
TYP.
-
-
-
MAX.
-
-
-
UNIT
nS
nS
nS
Note: Ports are read during S5P2, and output data becomes available at the end of S6P2. The timing data are referenced to
ALE, since it provides a convenient reference.
- 11 -
Publication Release Date: March 7, 2006
Revision A5
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet W78L32P-24.PDF ] | |
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