tmp89fm82 TOSHIBA Semiconductor CORPORATION, tmp89fm82 Datasheet - Page 279

• Manufacturer Part Number: tmp89fm82
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA000
17. Serial Expansion Interface (SEI)
17.1
full-duplex synchronous communication protocols. The TMP89FM82 contain one channel of SEI.
MISO, and SS pins respectively are shared with P24, P26, P25 and P23. When using these ports as SECLK, MOSI,
MISO, or SS pins, set each pins to SEI function.
SEI is one of the serial interfaces incorporated in the TMP89FM82. It allows connection to peripheral devices via
SEI is connected with an external device through SECLK, MOSI, MISO and the terminal SS. SECLK, MOSI,
Features
・ The master outputs the shift clock for only a data transfer period.
・ The clock polarity and phase are programmable.
・ The data is 8 bits long.
・ MSB or LSB-first can be selected.
・ The programmable data and clock timing of SEI can be connected to almost all synchronous serial peripheral
・ The transfer rate can be selected from the following four (master only):
・ The error detection circuit supports the following functions:
devices. Refer to “"17.5 SEI Transfer Formats " ”.
1. Write collision detection: When the shift register is accessed for write during transfer
2. Overflow detection: When new data is received while the transfer-finished flag is set (slave only)
3. Mode fault error input: When the SEI device is set as the master, driver output is disabled immediately
4. The transfer error detect: High Level input to the SS pin during data transfer as a slave mode
4 Mbps, 2 Mbps, 1 Mbps, or 250 kbps (when operating at 8MHz)
upon input of a low level on the SS pin (in open-drain output mode only).
register
register
control
status
SEI
SEI
Figure 17-1 SEI (Serial Extended Interface)
SEE
MODE
MSTR
CPHA
CPOL
BOS
SER
MODF
WCOL
SOVF
SEF
4, 8, 16, 64 divide
Clock control unit
Internal SEI clock
SEI control unit
Clock selection
Page 263
(INTSEI0/INTSEI1)
SEI interrupt
MISO
Bit order selection
SEI data register
Port control unit
Read buffer
Shift register
MOSI SECLK SS
Data
Address
TMP89FM82