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PDF W78C32C Data sheet ( Hoja de datos )
| Número de pieza | W78C32C | |
| Descripción | 8-BIT MICROCONTROLLER | |
| Fabricantes | nuvoton | |
| Logotipo |  |
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W78C32C/W78C032C DATA SHEET
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION.......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. PIN CONFIGURATIONS............................................................................................................. 3
4. PIN DESCRIPTION..................................................................................................................... 4
5. FUNCTIONAL DESCRIPTION.................................................................................................... 6
5.1 TIMERS 0, 1, AND 2....................................................................................................... 6
5.2 CLOCK............................................................................................................................ 6
5.2.1 CRYSTAL OSCILLATOR .................................................................................................6
5.2.2 EXTERNAL CLOCK .........................................................................................................6
5.3 POWER MANAGEMENT ............................................................................................... 6
5.3.1 IDLE MODE......................................................................................................................6
5.3.2 POWER-DOWN MODE ...................................................................................................7
5.3.3 RESET .............................................................................................................................7
6. ELECTRICAL CHARACTERISTICS ........................................................................................... 8
6.1 ABSOLUTE MAXIMUM RATINGS ................................................................................. 8
6.2 D.C. CHARACTERISTICS.............................................................................................. 8
6.3 A.C. CHARACTERISTICS .............................................................................................. 9
6.3.1 CLOCK INPUT WAVEFORM ...........................................................................................9
6.3.2 PROGRAM FETCH CYCLE ...........................................................................................10
6.3.3 DATA READ CYCLE ......................................................................................................10
6.3.4 DATA WRITE CYCLE ....................................................................................................11
6.3.5 PORT ACCESS CYCLE .................................................................................................11
7. TIMING waveformS................................................................................................................... 12
7.1 PROGRAM FETCH CYCLE ......................................................................................... 12
7.2 DATA READ CYCLE..................................................................................................... 12
7.3 DATA WRITE CYCLE................................................................................................... 13
7.4 PORT ACCESS CYCLE ............................................................................................... 13
8. TYPICAL APPLICATION CIRCUIT ........................................................................................... 14
8.1 USING EXTERNAL PROGRAM MEMORY AND CRYSTAL........................................ 14
8.2 EXPANDED EXTERNAL DATA MEMORY AND OSCILLATOR.................................. 15
9. PACKAGE DIMENSIONS ......................................................................................................... 16
9.1 40-PIN DIP .................................................................................................................... 16
9.2 44-PIN PLCC ................................................................................................................ 16
9.3 44-PIN QFP .................................................................................................................. 17
10. REVISION HISTORY ................................................................................................................ 18
Publication Release Date: December 4, 2006
- 1 - Revision A6
1 page  
W78C32C/W78C032C
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, VCC
Power Supplies. These are the chip ground and positive supplies.
Publication Release Date: December 4, 2006
- 5 - Revision A6
5 Page 
W78C32C/W78C032C
6.3.4 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
6.3.5 Port Access Cycle
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
Port Input Setup to ALE Low
TPDS
1 TCP
-
-
nS
Port Input Hold from ALE Low
TPDH 0 - - nS
Port Output to ALE
TPDA
1 TCP
-
-
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: December 4, 2006
Revision A6
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet W78C32C.PDF ] | |
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