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PDF HMS87C1904 Data sheet ( Hoja de datos )
| Número de pieza | HMS87C1904 | |
| Descripción | 8-BIT SINGLE-CHIP MICROCONTROLLERS | |
| Fabricantes | ABOV | |
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ABOV SEMICONDUCTOR
8-BIT SINGLE-CHIP MICROCONTROLLERS
HMS87C1904
HMS87C1902
User’s Manual (Ver. 1.1)
1 page  
HMS87C1904 / HMS87C1902
HMS87C1904 / HMS87C1902
CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
1. OVERVIEW
1.1 Description
The HMS87C1904 is an advanced CMOS 8-bit microcontroller with 4K/2K bytes of EPROM. The ABOV HMS87C1904
is a powerful microcontroller which provide a highly flexible and cost effective solution to many small applications. The
HMS87C1904 provides the following standard features: 4K/2K bytes of EPROM, 128bytes of RAM, 8-bit timer/counter, 8-
bit A/D converter, 10-bit high speed PWM output, Power on reset circuit, on-chip oscillator and clock circuitry. In addition,
the HMS87C1904 supports power saving modes to reduce power consumption.
This document is only explained for the base of HMS87C1904.
Device name
HMS87C1904
HMS87C1902
EPROM
4K bytes
2K bytes
RAM EXT.INT
I/O
128bytes 2 5 I/O + 1 Input
128bytes 2 5 I/O + 1 Input
Operating
Voltage
2.5 ~ 5.5V
2.5 ~ 5.5V
Package
8 PDIP or SOP
8 PDIP or SOP
1.2 Features
• 4K/2K Bytes On-chip Program Memory
• 128 Bytes of On-chip Data RAM
(Included stack memory)
• Instruction Cycle Time:
- 250nS at 8MHz
• Programmable I/O pins
(LED direct driving can be source and sink)
- Input/Output : 5
- Input only : 1
• 8-bit A/D Converter
- 4 channels
• One 8-bit Basic Interval Timer
• Two 8-bit Timer / Counters
• One 10-bit High Speed PWM Outputs
• Watchdog timer
• Eight Interrupt sources
- Keyscan
- External INT0
- A/D Conversion
- Timer: 4
- PFD
• Noise Immunity Circuit
- Power Fail Processor ( 3.2V or 2.4V )
• Power Down Mode
- STOP mode (excluding HF mode)
- SLEEP mode
• Operating Frequency
- LF : X-tal, Resonator ( 32KHz ~ 200KHz )
- ERC : RC Oscillation ( 200KHz ~ 4MHz )
- XT : X-tal, Resonator ( 455KHz ~ 4MHz )
- HF : X-tal, Resonator ( 4MHz ~ 12MHz )
- IRC : Internal RC-oscillation ( 4MHz )
• Operating Voltage
- 2.5 ~ 5.5V ( LF, ERC, XT, IRC )
- 4.5 ~ 5.5V ( HF )
• Operating Temperature
- -40 ~ 85°C
MAR. 2006 ver 1.1
1
5 Page 
HMS87C1904 / HMS87C1902
5. PIN FUNCTION
VDD: Supply voltage.
VSS: Circuit ground.
RESET: Reset the MCU.
XIN: Input to the inverting oscillator amplifier and input to
the internal main clock operating circuit.
XOUT: Output from the inverting oscillator amplifier.
R00~R05: R0 is a 6-bit, CMOS, bidirectional I/O port ex-
cept for input only pin R03. R0 pins can be used as outputs
or inputs according to “1” or “0” written the their Port Di-
rection Register(R0IO).In addition, R0 serves the func-
tions of the various special features in Table 5-1.
Port pin
R00
R01
R02
R03
R04
RA5
Alternate function
AN0 ( Analog Input Port 0 )
T0O ( Timer0 Output )
PWM1O ( PWM Output )
AN1 ( Analog Input Port 1 )
AN2 ( Analog Input Port 2 )
EC0 ( Event Counter Input 0 )
INT0 ( External Interrupt Input Port 0 )
RESET ( RESET )
VPP ( EPROM Programming Voltage Input )
AN3 ( Analog Input Port34 )
XOUT (Oscillator Output )
XIN (Oscillator Input )
Table 5-1 R0 Port
PIN NAME
VDD
VSS
R00 / AN0 / T0O / PWM1O
R01 / AN1
R02 / AN2 / EC0 / INT0
R03 / RESET / VPP
R04 / AN3 / XOUT
R05 / XIN
PIN
No.
In/Out
Basic
Function
Alternate
1 - Supply voltage
8 - Circuit ground
7 I/O (Input)
Analog Input Port 0 Timer 0 Output
PWM Output
6 I/O (Input) General Analog Input Port 1
5
I/O (Input)
I/O ports
Analog Input Port 2
External Event Counter
Input 0
External Interrupt
Input 0
4 I (Input) Input Port RESET Input
Programming Voltage Input
3 I/O (Input) General Analog Input Port 3 Oscillator Output (XT, LP mode)
2 Input I/O ports Oscillator Input or External Clock Source Input
Table 5-2 Pin Description
MAR. 2006 ver 1.1
7
11 Page | ||
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| PDF Descargar | [ Datasheet HMS87C1904.PDF ] | |
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