參數(shù)資料
型號： SCF5250AG120
廠商： Motorola, Inc.
英文描述： SCF5250 Integrated ColdFire Microprocessor
中文描述： SCF5250提供了集成的ColdFire微處理器
文件頁數(shù)： 18/48頁
文件大?。?/td> 767K
代理商： SCF5250AG120
SCF5250 Integrated ColdFire Microprocessor Data Sheet, Rev. 1.1
Signal Descriptions
Freescale Semiconductor
18
consumption is important the current taken by the divider network (in
stand-by mode) could be excessive. Therefore it is possible to generate a
VDD/2 voltage by selecting SCLK4 output mode and feeding this clock
signal (which is 50% duty cycle) through an external integration circuit.
This would generate a voltage level equal to VDD/2 but would be disabled
when stand-by mode was selected.
4.15 Secure Digital/ MemoryStick Card Interface
The device has a versatile flash card interface that supports both SecureDigital and MemoryStick cards.
The interface can either support one SecureDigital or two MemoryStick cards. No mixing of card types is
possible.
Table 11
gives the pin descriptions.
4.16 Queued Serial Peripheral Interface (QSPI)
The QSPI interface is a high-speed serial interface allowing transmit and receive of serial data. Pin
descriptions are given in
Table 12
.
Table 11. Flash Memory Card Signals
Flash Memory Signal
Description
EBUIN2/SCLKOUT/GPIO13
Clock out for both MemoryStick interfaces and for SecureDigital
EBUIN3/CMD_SDIO2/GPIO14
Secure Digital command line
MemoryStick interface 2 data i/o
DDATAO/CTS1/SDATA0_SDIO1/GPIO1
SecureDigital serial data bit 0
MemoryStick interface 1 data i/o
SCL0/SDATA1_BS1/GPIO41
SecureDigital serial data bit 1
MemoryStick interface 1 strobe
DDATA1/RTS1/SDATA2_BS2/GPIO2
SecureDigital serial data bit 2
MemoryStick interface 2 strobe
Reset output signal
Selection between Reset function and SDATA2_BS2 is done by
programming PLLCR register.
SDA0/SDATA3/GPIO42
SecureDigital serial data bit 3
Table 12. Queued Serial Peripheral Interface (QSPI) Signals
Serial
Module Signal
Description
QSPICLK/SUBR/GPIO25
Multiplexed signal IIC interface clock or QSPI clock output
Function select is done via PLLCR register.
RCK/QSPIDIN/QSPI_DOUT/GPIO26
Multiplexed signal IIC interface data or QSPI data input.
Function select is done via PLLCR register.
RCK/QSPI_DIN/QSPI_DOUT/GPIO26
QSPI_DOUT/SFSY/GPIO27
QSPI data output
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