tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 217

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

17.4
17.5
17.3.2
17.3.2.1
17.3.2.2
the transmit/receive data buffer register are used. The upper 4 bits are cleared to “0” when receiving.
continuously. The number of words to be transferred can be selected by SIOCR2<BUF>.
Either 4-bit or 8-bit serial transfer can be selected. When 4-bit serial transfer is selected, only the lower 4 bits of
The data is transferred in sequence starting at the least significant bit (LSB).
Up to 8 words consisting of 4 bits of data (4-bit serial transfer) or 8 bits (8-bit serial transfer) of data can be transferred
Number of bits to transfer
Number of words to transfer
The leading edge is used to transmit, and the trailing edge is used to receive.
Shift edge
output).
SCK
pin (Input)
Transmitted data are shifted on the leading edge of the serial clock (falling edge of the SCK pin input/
Received data are shifted on the trailing edge of the serial clock (rising edge of the SCK pin input/output).
Leading edge
Trailing edge
SCK pin
SO pin
SCK pin
SI pin
Shift register
Shift register
t
SCKL
Figure 17-4 External clock pulse width
t
SCKH
****
Figure 17-5 Shift edge
Bit 0
3210
Bit 0
(a) Leading edge
(b) Trailing edge
0 ***
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* 321
Bit 1
Bit 1
10 **
** 32
Bit 2
Bit 2
210 *
t
SCKL
Bit 3
*** 3
Bit 3
, t
SCKH
3210
> 2
4
/fc
* ; Don’t care
TMP88FW45AFG