參數(shù)資料
型號: TSC80251G2D-24CB
廠商: Atmel
文件頁數(shù): 5/77頁
文件大小: 0K
描述: IC C251 MCU ROMLESS 5V 44PLCC
標準包裝: 27
系列: 8x251
核心處理器: C251
芯體尺寸: 8/16-位
速度: 24MHz
連通性: EBI/EMI,I²C,Microwire,SPI,UART/USART
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 32
程序存儲器類型: ROMless
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 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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