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PDF N79E854 Data sheet ( Hoja de datos )
| Número de pieza | N79E854 | |
| Descripción | 8051-based Microcontroller | |
| Fabricantes | Nuvoton | |
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Nuvoton 8051-based Microcontroller
N79E855
N79E854
Data Sheet
Version: A2.5
1 page  
N79E855/854 Data Sheet
1 General Description
The N79E855/854 8-bit Turbo 51 (4T Mode) microcontroller is embedded with 16K[1]/8K bytes Flash EPROM which can
be programmed through universal hardware writer, serial ICP (In Circuit Program) programmer, software ISP function.
The instruction sets of the N79E855/854 are fully compatible with the standard 8052. The N79E855/854 contains 16K/8K
bytes Application Flash EPROM (APROM) memory, 4 Kbytes Data Flash memory, and 2 Kbytes Load Flash EPROM
(LDROM) memory; 256 bytes direct and indirect RAM, 256 bytes XRAM; 25 I/O with bit-addressable I/O ports; two 16-
bit timers/counters; 8-channel multiplexed 10-bit A/D converter; 4-channel 10-bit PWM; three serial ports including a
SPI, I2C and an enhanced full duplex serial port; 2-level BOD voltage detection/reset, and power-on reset (POR). The
N79E855/854 also supports internal RC oscillator at the nominal frequency of 22.1184 MHz. The accuracy of RC
oscillator (22.1184 MHz) is trimmed as ±1% under the condition of room temperature and VDD = 5V before shipping from
by factory trimming mechanism. These peripherals are supported by 14 sources of four-level interrupt capability. To
facilitate programming and verification, the Flash EPROM inside the N79E855/854 allows the program memory to be
programmed and read electronically. Once the code is confirmed, the user can protect the code for security.
The N79E855/854 microcontroller, featuring wide operating voltage range, built-in rich analog and digital peripherals and
non-volatile Flash memory, is widely suitable for general control and home appliances.
[1] For N79E855, Data Flash and APROM share 16 Kbytes space.
April 23, 2014
Page 5 of 180
Revision A2.5
5 Page 
N79E855/854 Data Sheet
Table 5–1 Pin Description
Pin No.
Alternate Function
SOP28
TSSOP28
Symbol
1
2
3
21 VDD
Type
Description
P POWER SUPPLY: Supply voltage VDD for operation.
7 VSS
P GROUND: Ground potential
6 /RST
RESET: Chip reset pin that is low active. Because reset pin has
I internal pull-up resistor (about 200 KΩat VDD = 5V), this pin cannot
(ST) be floating. Reset pin should be connected to a 100Ω pull-up
resistor and a 10uF pull-low capacitor.
3 P0.0 PWM3
KB0 SPICLK
I/O
PORT0: Port 0 has 4-type I/O port. Its multifunction pins are for
PWM0, PWM3, T1, BRAKE, SPICLK, ADC0~ADC6 and KB0 ~
KB7.
26 P0.1 PWM0 ADC0 KB1
I/O ADC0 ~ADC6: ADC channel input.
25 P0.2 BRAKE ADC1 KB2
KB0 ~ KB7: Keyboard Input
I/O
The PWM0 and PWM3 is PWM output channel.
24 P0.3
23 P0.4
ADC2 KB3
ADC3 KB4
I/O T1: Timer 1 External Input
SPICLK: SPI-1 clock pin
I/O
22 P0.5
ADC4 KB5
I/O
20 P0.6
ADC5 KB6
I/O
19
P0.7
T1 ADC6 KB7
IC1
I/O
18 P1.0 TXD
17 P1.1 RXD
I/O
PORT1: Port 1 has 4-type I/O port. Its multifunction pins are for
TXD, RXD, T0, /INT0, /INT1, SCL, SDA, STADC, ICPDAT,
ICPCLK and /SS, MISO, MOSI.
I/O The TXD and RXD are UART port
12 P1.2 T0
11 P1.3 /INT0
SCL
SDA
IC0
The SCL and SDA are I2C function with open-drain port.
D
The ICPDAT and ICPCLK are ICP (In Circuit Programming)
function pin.
D
The /SS, MISO, MOSI are SPI-1 function pins.
10 P1.4 /INT1 STADC
/SS I/O The PWM1 and PWM2 are PWM output channel
5 P1.6 PWM1
ICPDAT MISO
T0: Timer 0 External Input
I/O IC0/1: Input Capture pin
4 P1.7 PWM2
ICPCLK MOSI
STADC: ADC trigger by external pin
I/O
1 P2.0
2 P2.1
13 P2.2
IC2
MOSI2
I/O
PORT2: Port 2 has 4-type I/O port. Its multifunction pins are for
T2, ADC7, TXD2, RXD2 and MOSI2, MISO2, /SS2, SPICLK2,
IC2
I/O The TXD2 and RXD2 are UART port by software switch form
TXD1 and RXD1.
I/O The MOSI2, MISO2, /SS2 and SPICLK2 are SPI-2 function pins.
April 23, 2014
Page 11 of 180
Revision A2.5
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet N79E854.PDF ] | |
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