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PDF N79E845 Data sheet ( Hoja de datos )
| Número de pieza | N79E845 | |
| Descripción | 8051-based Microcontroller | |
| Fabricantes | Nuvoton | |
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Nuvoton 8051-based Microcontroller
N79E845
N79E844
N79E8432
Data Sheet
Version: A2.6
1 page  
N79E845/844/8432 Data Sheet
1 General Description
The N79E845/844/8432 8-bit Turbo 51 (4T Mode) microcontroller is embedded with 16K[1]/8K/4K 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 N79E845/844/8432 is fully compatible with the standard 8052. The
N79E845/844/8432 contains 16K/8K/4K 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;
17 I/O with bit-addressable I/O ports; two 16-bit timers/counters; 7-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 detec-
tion/reset, and power-on reset (POR). The N79E845/844/8432 also supports internal RC oscillator at the nominal frequen-
cy of 22.1184 MHz. The accuracy of RC oscillator (22.1184 MHz) is trimmed as ±1% under the condition of room tem-
perature and VDD = 5V before shipping from by factory trimming mechanism, which peripherals are supported by 14
sources of four-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the
N79E845/844/8432 allows the program memory to be programmed and read electronically. Once the code is confirmed,
the user can protect the code for security.
The N79E845/844/8432 microcontroller, featuring wide operating voltage range, built-in rich analog and digital periph-
erals and non-volatile Flash memory, is widely suitable for general control and home appliances.
[1] For N79E845, Data Flash and APROM share 16 Kbytes space.
April 23 2014
Page 5 of 183
Revision A2.6
5 Page 
N79E845/844/8432 Data Sheet
Table 5–1 Pin Description
Pin number
Sym-
Alternate Function
SOP16
SOP20
TSSOP20
12
3
12 15 VDD
Type
Description
P POWER SUPPLY: Supply voltage VDD for operation.
5 5 VSS
P GROUND: Ground potential
4 4 /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 can-
(ST) not be floating. Reset pin should be connected to 100Ω pull-up
resistor and 10uF pull-low capacitor.
1 1 P0.0 PWM3
PORT0: Port 0 has 4-type I/O port. Its multifunction pins are for PWM0,
KB0 SPICLK I/O PWM3, T1, BRAKE, SPICLK, ADC0~ADC6 and KB0~KB7.
ADC0 ~ADC6: ADC channel input.
16
20
P0.1 PWM0
ADC0
KB1
KB0 ~ KB7: Key Board Input
I/O
The PWM0 and PWM3 is PWM output channel.
T1: Timer 1 External Input
15
19
P0.2 BRAKE ADC1
KB2
I/O SPICLK: SPI-1 clock pin
14 18 P0.3
ADC2
KB3
I/O
13 17 P0.4
ADC3
KB4
I/O
- 16 P0.5
ADC4
KB5
I/O
- 14 P0.6
ADC5
KB6
I/O
-
13
P0.7
T1
ADC6
KB7
IC1 I/O
11 12 P1.0 TXD
10 11 P1.1 RXD
9 10 P1.2 T0
8 9 P1.3 /INT0
PORT1: Port 1 has 4-type I/O port. Its multifunction pins are for TXD, RXD,
I/O T0, /INT0, /INT1, SCL, SDA, STADC, ICPDAT, ICPCLK and /SS, MISO,
MOSI.
The TXD and RXD are UART port
I/O The SCL and SDA are I2C function with open-drain port.
The ICPDAT and ICPCLK are ICP (In Circuit Programming) function pin.
The /SS, MISO, MOSI are SPI-1 function pins.
SCL IC0 D
The PWM1 and PWM2 are PWM output channel
T0: Timer 0 External Input
SDA
D IC0/1: Input Capture pin
April 23 2014
Page 11 of 183
Revision A2.6
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet N79E845.PDF ] | |
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