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N78E517A 데이터시트 PDF : 부품 기능 및 핀배열

부품번호 N78E517A
기능 8-bit 8051-based Microcontroller
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N78E517A 데이터시트 및 N78E517A PDF

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N78E517A pdf, 반도체, 판매, 대치품
N78E517A Data Sheet
1. DESCRIPTION
N78E517A is an 8-bit microcontroller, which has an in-system programmable Flash supported. The instruction
set of N78E517A is fully compatible with the standard 8051. N78E517A contains a maximum 64k[1] bytes of
main Flash APROM, in which the contents of the main program code can be updated by parallel Program-
mer/Writer or In System Programming (ISP) method which enables on-chip firmware updating. There is an ad-
ditional 2.5k bytes called LDROM for ISP function. N78E517A has a configurable size of Data Flash[1] which is
64k-byte shared with APROM, accessed with ISP. N78E517A provides 256 bytes of SRAM, 1k bytes of auxilia-
ry RAM (XRAM), four 8-bit bi-directional and bit-addressable I/O ports, an additional 8-bit bi-directional and bit-
addressable port P4 for LQPF-48 package (PLCC-44, PQFP-44, and TQFP-44 just have low nibble 4 bits of
P4 and DIP-40 does not have this additional P4), three 16-bit Timers/Counters, one UART, five PWM output
channels, and one SPI. These peripherals equip with 11-source with 4-level priority interrupts capability. To
facilitate programming and verification, the Flash inside the N78E517A allows the Program Memory to be pro-
grammed and read electronically. Once the code confirms, the user can lock the code for security.
N78E517A is built in a precise on-chip RC oscillator of 22.1184MHz/11.0592MHz selected by CONFIG setting,
factory trimmed to ±1% at room temperature. N78E517A provides additional power monitoring detection such
as power-on and Brown-out detection. It stabilizes the power-on/off sequence for a high reliability system de-
sign.
N78E517A microcontroller operation consumes a very low power. Two economic power modes to reduce pow-
er consumption, Idle mode and Power Down mode. Both of them are software selectable. The Idle mode turns
off the CPU clock but allows continuing peripheral operation. The Power Down mode stops the whole system
clock for minimum power consumption.
[1] Data Flash and APROM share 64k-byte space.
-4-

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N78E517A 전자부품, 판매, 대치품
3. BLOCK DIAGRAM
Figure 31 shows the functional block diagram of N78E517A. It gives the outline of the device. The user can
find all the devices peripheral functions in the diagram.
VDD
VSS
RST
P0[7:0]
8
P1[7:0]
8
P2[7:0]
8
P3[7:0]
8
P4[7:0]
8
XTAL1
XTAL2
Brownout and
low voltage
detection
12T 80C51 CPU
Max. 64k Bytes
APROM Flash
2.5k Bytes
LDROM Flash
Data Flash
Shared 64k Bytes
with APROM
256 Bytes
Internal RAM
1024 Bytes
XRAM
(Auxiliary RAM)
I/O Port, P0
I/O Port, P1
Timer0
Timer 1
Timer 2
Serial Port
(UART)
SPI
PWM
External
Interrupt
Watchdog
Timer
Power Down
Waking-up Timer
I/O Port, P2
I/O Port, P3
External Memory
Bus Interface
I/O Port, P4
System
Clock
Power
Management
Oscillating
Circuit
12T/6T Divider
On-chip RC
Oscillator
Figure 31. N78E517A Function Block Diagram
T0 (P3.4)
T1 (P3.5)
T2 (P1.0)
T2EX (P1.1)
TXD (P3.1)
RXD (P3.0)
SS (P1.4)
MOSI (P1.5)
MISO (P1.6)
SPCLK (P1.7)
5 PWM0~PWM4
(P1.3~P1.7)
INT0 (P3.2)
INT1 (P3.3)
INT2 (P4.3)
INT3 (P4.2)
8
8
AD[7:0] (P0[7:0])
A[15:8] (P2[7:0])
ALE
PSEN
WR (P3.6)
RD (P3.7)
Publication Release Date: September 4, 2012
- 7 - Revision: V2.2

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부품번호상세설명 및 기능제조사
N78E517A

The functions of this components is a 8-bit 8051-based Microcontroller.

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