參數資料
型號: MC68HC11F1CPU4
廠商: Freescale Semiconductor
文件頁數: 7/158頁
文件大小: 0K
描述: IC MCU 512 EEPROM 4MHZ 80-LQFP
標準包裝: 90
系列: HC11
核心處理器: HC11
芯體尺寸: 8-位
速度: 4MHz
連通性: SCI,SPI
外圍設備: POR,WDT
輸入/輸出數: 30
程序存儲器類型: ROMless
EEPROM 大?。?/td> 512 x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 4.75 V ~ 5.25 V
數據轉換器: A/D 8x8b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 80-LQFP
包裝: 托盤
SERIAL PERIPHERAL INTERFACE
MC68HC11F1
8-6
TECHNICAL DATA
SPIE — Serial Peripheral Interrupt Enable
Set the SPE bit to one to request a hardware interrupt sequence each time the SPIF
or MODF status ag is set. SPI interrupts are inhibited if this bit is clear or if the I bit in
the condition code register is one.
0 = SPI system interrupts disabled
1 = SPI system interrupts enabled
SPE — Serial Peripheral System Enable
When the SPE bit is set, the port D bit 2, 3, 4, and 5 pins are dedicated to the SPI func-
tion. If the SPI is in the master mode and DDRD bit 5 is set, then the port D bit 5 pin
becomes a general-purpose output instead of the SS input.
0 = SPI system disabled
1 = SPI system enabled
DWOM — Port D Wired-OR Mode
DWOM affects all port D pins.
0 = Normal CMOS outputs
1 = Open-drain outputs
MSTR — Master Mode Select
0 = Slave mode
1 = Master mode
CPOL — Clock Polarity
When the clock polarity bit is cleared and data is not being transferred, the SCK pin of
the master device has a steady state low value. When CPOL is set, SCK idles high.
CPHA — Clock Phase
The clock phase bit, in conjunction with the CPOL bit, controls the clock-data relation-
ship between master and slave. The CPHA bit selects one of two different clocking
SPR[1:0] — SPI Clock Rate Selects
These two bits select the SPI clock (SCK) rate when the device is configured as mas-
ter. When the device is configured as slave, these bits have no effect. Refer to Table
Table 8-1 SPI Clock Rates
SPR[1:0]
E Clock
Divide By
Frequency at
E = 2 MHz
Frequency at
E = 3 MHz
Frequency at
E = 4 MHz
Frequency at
E = 5 MHz
0 0
2
1.0 MHz
1.5 MHz
2.0 MHz
2.5 MHz
0 1
4
500 kHz
750 kHz
1.0 MHz
625 kHz
1 0
16
125 kHz
187.5 kHz
250 kHz
156.25 kHz
1 1
32
62.5 kHz
93.7 kHz
125 kHz
78.125 kHz
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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