参数资料
型号: AT80251G2D-SLSUM
厂商: Atmel
文件页数: 5/77页
文件大小: 0K
描述: IC 8051 MCU ROMLESS 44PLCC
标准包装: 972
系列: 8x251
核心处理器: C251
芯体尺寸: 8/16-位
速度: 24MHz
连通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 32
程序存储器类型: ROMless
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
13
AT/TSC8x251G2D
4135F–8051–11/06
Special Function
Registers
The Special Function Registers (SFRs) of the TSC80251G2D derivatives fall into the
categories detailed in Table 1 to Table 9.
SFRs are placed in a reserved on-chip memory region S: which is not represented in the
data memory mapping (Figure 5). The relative addresses within S: of these SFRs are
provided together with their reset values in Table . They are upward compatible with the
SFRs of the standard 80C51 and the Intel’s 80C251Sx family. In this table, the C251
core registers are identified by Note 1 and are described in the TSC80251 Program-
mer’s Guide. The other SFRs are described in the TSC80251G1D Design Guide. All the
SFRs are bit-addressable using the C251 instruction set.
Table 1.
C251 Core SFRs
Note:
1. These SFRs can also be accessed by their corresponding registers in the register
file.
Table 2.
I/O Port SFRs
Table 3.
Timers SFRs
Mnemonic
Name
Mnemonic
Name
ACC(1)
Accumulator
SPH(1)
Stack Pointer High - MSB of
SPX
B(1)
B Register
DPL(1)
Data Pointer Low byte - LSB of
DPTR
PSW
Program Status Word
DPH(1)
Data Pointer High byte - MSB
of DPTR
PSW1
Program Status Word 1
DPXL(1)
Data Pointer Extended Low
byte of DPX - Region number
SP(1)
Stack Pointer - LSB of SPX
Mnemonic
Name
Mnemonic
Name
P0
Port 0
P2
Port 2
P1
Port 1
P3
Port 3
Mnemonic
Name
Mnemonic
Name
TL0
Timer/Counter 0 Low
Byte
TMOD
Timer/Counter 0 and 1
Modes
TH0
Timer/Counter 0 High
Byte
T2CON
Timer/Counter 2
Control
TL1
Timer/Counter 1 Low
Byte
T2MOD
Timer/Counter 2 Mode
TH1
Timer/Counter 1 High
Byte
RCAP2L
Timer/Counter 2
Reload/Capture Low
Byte
TL2
Timer/Counter 2 Low
Byte
RCAP2H
Timer/Counter 2
Reload/Capture High
Byte
TH2
Timer/Counter 2 High
Byte
WDTRST
WatchDog Timer Reset
TCON
Timer/Counter 0 and 1
Control
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