參數(shù)資料
型號: C8051F221
廠商: Silicon Laboratories Inc
文件頁數(shù): 112/146頁
文件大?。?/td> 0K
描述: IC 8051 MCU 8K FLASH 32LQFP
標準包裝: 250
系列: C8051F2xx
核心處理器: 8051
芯體尺寸: 8-位
速度: 25MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 22
程序存儲器容量: 8KB(8K x 8)
程序存儲器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 22x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-LQFP
包裝: 托盤
C8051F2xx
68
Rev. 1.6
9.3.
Special Function Registers
The direct-access data memory locations from 0x80 to 0xFF constitute the special function registers
(SFRs). The SFRs provide control and data exchange with the CIP-51's resources and peripherals. The
CIP-51 duplicates the SFRs found in a typical 8051 implementation as well as implementing additional
SFRs used to configure and access the sub-systems unique to the MCU. This allows the addition of new
functionality while retaining compatibility with the MCS-51 instruction set. Table 9.3 lists the SFRs imple-
mented in the CIP-51 System Controller.
The SFR registers are accessed anytime the direct addressing mode is used to access memory locations
from 0x80 to 0xFF. SFRs with addresses ending in 0x0 or 0x8 (e.g. P0, TCON, P1, SCON, IE, etc.) are bit-
addressable as well as byte-addressable.
All other SFRs are byte-addressable only.
Unoccupied
addresses in the SFR space are reserved for future use. Accessing these areas will have an indetermi-
nate effect and should be avoided. Refer to the corresponding pages of the datasheet, as indicated in
Table 9.3, for a detailed description of each register.
Notes:
1. C8051F230/1/6 Do not have these registers.
2. C8051F221/231 Does not have this register (32 pin package).
3. On the C8051F206 and C8051F226/236 only.
4. On the C8051F206 only (12-bit ADC)
Table 9.2. Special Function Register Memory Map
F8
SPI0CN
WDTCN
F0
B
P0MODE
P1MODE
P2MODE
P3MODE2
EIP1
EIP2
E8
ADC0CN1
RSTSRC
E0
ACC
PRT0MX
PRT1MX
PRT2MX
EIE1
EIE2
D8
D0
PSW
REF0CN
C8
T2CON
RCAP2L
RCAP2H
TL2
TH2
C0
ADC0GTL4 ADC0GTH1 ADC0LTL4 ADC0LTH1
B8
IP
AMX0SL1
ADC0CF1
ADC0L4
ADC0H1
B0
P3
OSCXCN
OSCICN
FLSCL
FLACL
A8
IE
SWCINT
EMI0CN3
A0
P2
PRT0CF
PRT1CF
PRT2CF
PRT3CF
98
SCON
SBUF
SPI0CFG
SPI0DAT
SPI0CKR
CPT0CN
CPT1CN
90
P1
88
TCON
TMOD
TL0
TL1
TH0
TH1
CKCON
PSCTL
80
P0
SP
DPL
DPH
PCON
0(8)
Bit Addressable
1(9)
2(A)
3(B)
4(C)
5(D)
6(E)
7(F)
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