參數(shù)資料
型號(hào): C8051F221R
廠商: Silicon Laboratories Inc
文件頁數(shù): 135/146頁
文件大?。?/td> 0K
描述: IC 8051 MCU 8K FLASH 32LQFP
標(biāo)準(zhǔn)包裝: 1
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(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)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: 剪切帶 (CT)
其它名稱: 336-1009-1
C8051F2xx
Rev. 1.6
89
SFR Definition 10.2. FLSCL: Flash Memory Timing Prescaler
Bit7:
FOSE: Flash One-Shot Timer Enable
0: Flash One-shot timer disabled.
1: Flash One-shot timer enabled
Bit6:
FRAE: Flash Read Always Enable
0: Flash reads per one-shot timer
1: Flash always in read mode
Bits5–4: UNUSED. Read = 00b, Write = don't care.
Bits3–0: FLASCL: Flash Memory Timing Prescaler.
This register specifies the prescaler value for a given system clock required to generate the
correct timing for Flash write/erase operations. If the prescaler is set to 1111b, Flash
write/erase operations are disabled.
0000: System Clock < 50 kHz
0001: 50 kHz < System Clock < 100 kHz
0010: 100 kHz < System Clock < 200 kHz
0011: 200 kHz < System Clock < 400 kHz
0100: 400 kHz < System Clock < 800 kHz
0101: 800 kHz < System Clock < 1.6 MHz
0110: 1.6 MHz < System Clock < 3.2 MHz
0111: 3.2 MHz < System Clock < 6.4 MHz
1000: 6.4 MHz < System Clock < 12.8 MHz
1001: 12.8 MHz < System Clock < 25.6 MHz
1010: 25.6 MHz < System Clock < 51.2 MHz*
1011, 1100, 1101, 1110: Reserved Values
1111: Flash Memory Write/Erase Disabled
The prescaler value is the smallest value satisfying the following equation:
FLASCL > log2(System Clock / 50kHz)
*For test purposes. The C8051F2xx is not guaranteed to operate over 25 MHz.
SFR Definition 10.3. FLACL: Flash Access Limit
Bits 7–0: FLACL: Flash Memory Access Limit.
This register holds the high byte of the 16-bit program memory read/write/erase limit
address. The entire 16-bit access limit address value is calculated as 0xNN00 where NN is
replaced by contents of FLACL. A write to this register sets the Flash Access Limit. Any
subsequent writes are ignored until the next reset.
R/W
Reset Value
FOSE
FRAE
-
FLASCL
10001111
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xB6
R/W
Reset Value
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
0xB7
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