TMP92CF30
2009-06-12
92CF30-458
(d)
CEN
This bit enables or disables the pins for the SD card and MMC connections.
When the card is not inserted or when it is not powered on, a shoot through current
might flow in the SPDI pin, for it enters the floating state. Also, currents may
unintentionally flow into the card from the SPCS , SPCLK and SPDO pins when they
generate a logic 1. This bit can be used to avoid these problems.
If write <CEN> to “0” with PRCR and PRFC selecting SPCS , SPCLK, SPDO and
SPDI signal, SPDI pin is prohibited to input (avoiding penetrated current) and SPCS ,
SPCLK, SPDO pin become high impedance.
When writing a “1” to the CEN bit, ensure that a card is properly inserted and
powered on, as well as that the clock signal is supplied to the SPIC (SPIMD<XEN> =
“1”).
(e)
SPCS_B
This bit specified the logic state of the
SPCS output.
(f)
UNIT16
This bit selects the data length for transmission and reception. The data length is
hereafter referred to as the UNIT. Data transmission or reception must not be
performed while changing the state of this bit
(g)
FDPXE
This bit should be set to “1” when performing the full-duplex communication. This
bit specifies whether to align the transmit and receive data on the UNIT-size
boundaries.
Data transmission or reception must not be performed while changing the state of
this bit.
(h)
TXMOD
This bit selects the data transmission mode from UNIT and Sequential modes.
During transmission, it is prohibited to change the transmission mode from Sequential
to UNIT, or vice versa.
For UNIT-mode transmission, the transmit FIFO buffer is disabled. The TEMP
interrupt is generated when the data is loaded from the transmit data register (SPITD)
to the transmit shift register.
For sequential-mode transmission, the 32-byte FIFO is enabled. The TEMP
interrupt is generated when the empty space of the FIFO becomes 16 bytes or 32 bytes.
(i)
TXE
This bit enables or disables data transmission. Data transmission is started when
this bit set to “1” after loading the transmit data into the transmit FIFO, or when
loading the transmit data to the transmit FIFO when this bit is already set to “1”. The
state of this bit can be changed even during data transmission. If this bit is cleared to 0
during a data transmission, the transmission is stopped after completing the
transmission of the UNIT data currently being transmitted.
Содержание TLCS-900/H1 Series
Страница 1: ...TOSHIBA Original CMOS 32 Bit Microcontroller TLCS 900 H1 Series TMP92CF30FG Semiconductor Company ...
Страница 650: ...TMP92CF30 2009 06 12 92CF30 648 7 Package Dimensions LQFP176 P 2020 0 40F TOP VIEW BOTTOM VIEW Detail view of A 25 1 A ...
Страница 652: ...TMP92CF30 2009 06 12 92CF30 650 ...