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AT89C51RD2 데이터시트 PDF




ATMEL Corporation에서 제조한 전자 부품 AT89C51RD2은 전자 산업 및 응용 분야에서
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부품번호 AT89C51RD2 기능
기능 8-bit Flash Microcontroller
제조업체 ATMEL Corporation
로고 ATMEL Corporation 로고


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AT89C51RD2 데이터시트, 핀배열, 회로
Features
80C52 Compatible
– 8051 Instruction Compatible
– Six 8-bit I/O Ports (64 Pins or 68 Pins Versions)
– Four 8-bit I/O Ports (44 Pins Version)
– Three 16-bit Timer/Counters
– 256 Bytes Scratch Pad RAM
– 9 Interrupt Sources with 4 Priority Levels
Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply
ISP (In-System Programming) Using Standard VCC Power Supply
2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default
Serial Loader
High-speed Architecture
– In Standard Mode:
• 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)
• 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)
– In X2 mode (6 Clocks/machine cycle)
• 20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)
• 30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)
64K Bytes On-chip Flash Program/Data Memory
– Byte and Page (128 Bytes) Erase and Write
– 100k Write Cycles
On-chip 1792 bytes Expanded RAM (XRAM)
– Software Selectable Size (0, 256, 512, 768, 1024, 1792 Bytes)
– 768 Bytes Selected at Reset for T89C51RD2 Compatibility
On-chip 2048 Bytes EEPROM Block for Data Storage (AT89C51ED2 Only)
100K Write Cycles
Dual Data Pointer
Variable Length MOVX for Slow RAM/Peripherals
Improved X2 Mode with Independent Selection for CPU and Each Peripheral
Keyboard Interrupt Interface on Port 1
SPI Interface (Master/Slave Mode)
8-bit Clock Prescaler
16-bit Programmable Counter Array
– High Speed Output
– Compare/Capture
– Pulse Width Modulator
– Watchdog Timer Capabilities
Asynchronous Port Reset
Full-duplex Enhanced UART with Dedicated Internal Baud Rate Generator
Low EMI (Inhibit ALE)
Hardware Watchdog Timer (One-time Enabled with Reset-Out), Power-off Flag
Power Control Modes: Idle Mode, Power-down Mode
Single Range Power Supply: 2.7V to 5.5V
Industrial Temperature Range (-40 to +85°C)
Packages: PLCC44, VQFP44, PLCC68, VQFP64
8-bit Flash
Microcontroller
AT89C51RD2
AT89C51ED2




AT89C51RD2 pdf, 반도체, 판매, 대치품
3. SFR Mapping
The Special Function Registers (SFRs) of the AT89C51RD2/ED2 fall into the following
categories:
• C51 core registers: ACC, B, DPH, DPL, PSW, SP
• I/O port registers: P0, P1, P2, P3, PI2
• Timer registers: T2CON, T2MOD, TCON, TH0, TH1, TH2, TMOD, TL0, TL1, TL2, RCAP2L,
RCAP2H
• Serial I/O port registers: SADDR, SADEN, SBUF, SCON
• PCA (Programmable Counter Array) registers: CCON, CCAPMx, CL, CH, CCAPxH, CCAPxL
(x: 0 to 4)
• Power and clock control registers: PCON
• Hardware Watchdog Timer registers: WDTRST, WDTPRG
• Interrupt system registers: IE0, IPL0, IPH0, IE1, IPL1, IPH1
• Keyboard Interface registers: KBE, KBF, KBLS
• SPI registers: SPCON, SPSTR, SPDAT
• BRG (Baud Rate Generator) registers: BRL, BDRCON
• Clock Prescaler register: CKRL
• Others: AUXR, AUXR1, CKCON0, CKCON1
Table 3-1.
Mnemonic
ACC
B
PSW
SP
DPL
DPH
C51 Core SFRs
Add Name
E0h Accumulator
F0h B Register
D0h Program Status Word
81h Stack Pointer
82h Data Pointer Low Byte
83h Data Pointer High Byte
76543210
CY
AC
F0
RS1 RS0
OV
F1
P
Table 3-2.
Mnemonic
PCON
AUXR
AUXR1
CKRL
CKCKON0
CKCKON1
System Management SFRs
Add Name
87h Power Control
8Eh Auxiliary Register 0
A2h Auxiliary Register 1
97h Clock Reload Register
8Fh Clock Control Register 0
AFh Clock Control Register 1
7
SMOD1
DPU
-
-
-
-
65
SMOD0
-
- M0
- ENBOOT
--
WDTX2 PCAX2
--
4
POF
XRS2
-
-
SIX2
-
3
GF1
XRS1
GF3
-
T2X2
-
2
GF0
XRS0
0
-
T1X2
-
1
PD
EXTRAM
-
-
T0X2
-
0
IDL
AO
DPS
-
X2
SPIX2
4 AT89C51RD2/ED2
4235K–8051–05/08

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AT89C51RD2 전자부품, 판매, 대치품
AT89C51RD2/ED2
Table 3-9.
Mnemonic
KBLS
KBE
KBF
Keyboard Interface SFRs
Add Name
9Ch Keyboard Level Selector
9Dh Keyboard Input Enable
9Eh Keyboard Flag Register
7
KBLS7
KBE7
KBF7
6
KBLS6
KBE6
KBF6
5
KBLS5
KBE5
KBF5
4
KBLS4
KBE4
KBF4
3
KBLS3
KBE3
KBF3
2
KBLS2
KBE2
KBF2
1
KBLS1
KBE1
KBF1
0
KBLS0
KBE0
KBF0
Table 3-10. EEPROM data Memory SFR (AT89C51ED2 only)
Mnemonic Add Name
76543210
EECON
D2h EEPROM Data Control
EEE EEBUSY
Table 3-11. SFR Mapping
Bit
Addressable
0/8 1/9
CH
F8h
0000 0000
F0h
B
0000 0000
P5 bit
E8h addressable
1111 1111
CL
0000 0000
E0h
ACC
0000 0000
CCON
D8h
00X0 0000
CMOD
00XX X000
D0h
PSW
0000 0000
FCON
XXXX 0000
C8h
T2CON
0000 0000
T2MOD
XXXX XX00
P4
C0h
1111 1111
IPL0
B8h
X000 000
P3
B0h
1111 1111
IEN0
A8h
0000 0000
SADEN
0000 0000
IEN1
XXXX X000
SADDR
0000 0000
shows all SFRs with their address and their reset value.
2/A
CCAP0H
XXXX XXXX
Non Bit Addressable
3/B 4/C 5/D
CCAP1H
XXXX XXXX
CCAP2H
XXXX XXXX
CCAP3H
XXXX XXXX
6/E
CCAP4H
XXXX XXXX
CCAP0L
XXXX XXXX
CCAP1L
XXXX XXXX
CCAP2L
XXXX XXXX
CCAP3L
XXXX XXXX
CCAP4L
XXXX XXXX
CCAPM0
X000 0000
EECON
xxxx xx00
RCAP2L
0000 0000
CCAPM1
X000 0000
RCAP2H
0000 0000
SPCON
0001 0100
CCAPM2
X000 0000
CCAPM3
X000 0000
CCAPM4
X000 0000
TL2
0000 0000
SPSTA
0000 0000
TH2
0000 0000
SPDAT
XXXX XXXX
IPL1
XXXX X000
IPH1
XXXX X000
7/F
P5 byte
Addressable
1111 1111
IPH0
X000 0000
CKCON1
XXXX XXX0
FFh
F7h
EFh
E7h
DFh
D7h
CFh
C7h
BFh
B7h
AFh
4235K–8051–05/08
7

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AT89C51RD2

8-bit Flash Microcontroller

ATMEL Corporation
ATMEL Corporation

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