w78c32c Winbond Electronics Corp America, w78c32c Datasheet
w78c32c
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w78c32c Summary of contents
Page 1
... The W78C32C microcontroller supplies a wider frequency range than most 8-bit microcontrollers on the market compatible with the industry standard 80C32 microcontroller series. The W78C32C contains four 8-bit bidirectional parallel ports, three 16-bit timer/counters, and a serial port. These peripherals are supported by a six-source, two-level interrupt capability. There are 256 bytes of RAM, and the device supports ROMless operation for application programs ...
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... ALE 12 29 INT0, P3.2 PSEN 13 28 P2.7, A15 INT1, P3.3 T0, P3 P2.6, A14 T1, P3 P2.5, A13 16 WR, P3.6 25 P2.4, A12 17 24 P2.3, A11 RD, P3 P2.2, A10 XTAL2 XTAL1 19 22 P2. P2.0, A8 Vss 44-Pin QFP (W78C32CF P1.5 P0.4, AD4 39 38 P1.6 P0 ...
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... RD Data Read Strobe EA External Address Input, active low. This pin forces the processor to execute out of external ROM. This pin should be kept low for all W78C32C operations. RST Reset Input, active high. This pin resets the processor. It must be kept high for at least two machine cycles in order to be recognized by the processor ...
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... Crystal 2. This is the crystal oscillator output the inversion of XTAL1 Power Supplies. These are the chip ground and positive supplies. BLOCK DIAGRAM RAM 256 Bytes SFR Timer 2 CPU Data Bus CORE Interrupt Timer W78C32C Port 0 Port 1 Alternate Port 2 Port 3 Alternate Serial Port Timer 0 INT 0 INT 1 ...
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... Timers 0 and 1. Clock The W78C32C is designed to be used with either a crystal oscillator or an external clock. Internally, the clock is divided by two before it is used. This makes the W78C32C relatively insensitive to duty cycle variations in the clock. Crystal Oscillator The W78C32C incorporates a built-in crystal oscillator. To make the oscillator work, a crystal must be connected across pins XTAL1 and XTAL2 ...
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... The external RESET signal is sampled at S5P2. To take effect, it must be held high for at least two machine cycles while the oscillator is running. An internal trigger circuit in the reset line is used to deglitch the reset line when the W78C32C is used with an external RC network. The reset logic also has a special glitch removal circuit that ignores glitches on the reset line ...
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... A OH2 4.5V IL1 4.5V IL2 5.5V IH1 5.5V IH2 OP, CP SYMBOL MIN W78C32C SPECIFICATION MIN. TYP. MAX 0.8 2 +0 and actual parts will CP CL TYP. MAX. UNIT NOTES - 40 MHz - - ...
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... DRD CP CP SYMBOL MIN. TYP DAW DAD DWD DWR W78C32C MAX. UNIT NOTES - MAX. UNIT NOTE ...
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... ALW T APL T PSW T AAS T PDA T T PDH, PDZ A0-A7 A0-A7 Code A0-A7 Data A8-A15 DATA T T DDA DAR T DDH, T DRD - 9 - W78C32C TYP. MAX. UNIT - - Data A0- DDZ Publication Release Date: July 1999 Revision A2 ...
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... Timing Waveforms, continued Data Write Cycle S4 XTAL1 ALE PSEN PORT 2 PORT 0 A0-A7 WR Port Access Cycle XTAL1 ALE T PDS PORT INPUT SAMPLE A8-A15 DATA OUT T DAD T T DAW DWR PDH - 10 - W78C32C DWD S1 T PDA DATA OUT ...
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... A13 P2.5 27 A14 P2.6 28 A15 P2 PSEN 30 ALE 11 TXD 10 RXD Figure 30P 30P 15P 15P 10P 10P 5P 5P Publication Release Date: July 1999 - 11 - W78C32C AD0 AD1 AD2 AD3 AD4 AD5 ...
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... P2 P2 A10 P2.2 23 P2.3 24 A11 74LS373 P2.4 25 A12 P2.5 26 A13 P2.6 27 A14 28 P2 PSEN 30 ALE 11 TXD 10 RXD Figure W78C32C AD0 AD1 AD2 AD3 AD4 AD5 AD6 ...
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... E Base Plane A 1 Seating Plane W78C32C Dimension in inch Dimension in mm Symbol Min. Nom. Max. Min. Nom. Max. 0.210 5.334 A A 0.010 0.254 1 A 0.150 0.155 0.160 3.81 3.937 4.064 2 B 0.016 0.018 ...
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... Detail F 1 Winbond Electronics (H.K.) Ltd. Rm. 803, World Trade Square, Tower II, 123 Hoi Bun Rd., Kwun Tong, Kowloon, Hong Kong TEL: 852-27513100 FAX: 852-27552064 - 14 - W78C32C Dimension in inch Dimension in mm Symbol Min. Nom. Max. Min. Nom. Max. A --- --- --- --- --- ...