tmp86fh09amg TOSHIBA Semiconductor CORPORATION, tmp86fh09amg Datasheet - Page 123

• Manufacturer Part Number: tmp86fh09amg
• Description: 8 Bit Microcontroller Tlcs-870/c Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

11.4
11.4.1
11.4.2
11.4.3
pends on the SEI device’s mode (master or slave). The SCLK pin, MOSI pin and MISO pin of all SEI devices
are connected with the same name pin to each other.
The TMP86FH09AMG have four input/output pins associated with SEI transfer. The functionality of each pin de-
SEI Pin Functions
for slave.
starts transfer, eight serial clock pulses are output from the SCLK pin only during transfer.
from the master.
able.
and is sampled at the opposite edge where the data is stable. The active edge is determined by SEI transfer pro-
tocols.
ter and slave are shown in the table below.
ister (In case P0 Port, Input/output Control Register is P0OUTCR).
abled). To set the MISO pin of an inactive slave device to a high-impedance state, clear the SECR<SEE> bit
to 0.
pin is high, the slave device ignores the serial clock from the master. Nor does it receive data from the MI-
SO pin. When the slave’s SS pin is L, the SEI operates as slave.
The SCLK pin functions as an output pin when SEI is set for master, or as an input pin when SEI is set
When SEI is set for master, serial clock is output from the SCLK pin to external devices. After the master
When SEI is set for slave, the SCLK pin functions as an input pin.
During data transfer between master and slave, device operation is synchronized by the serial clock output
When the SS pin of the slave device is “H”, data is not taken in regardless of whether the serial clock is avail-
For both master and slave devices, data is shifted in and out at a rising or falling edge of the serial clock,
The MISO and MOSI pins are used for serial data transmission/reception. The status of each pin during mas-
Also, the SCLK, MOSI, and MISO pins can be set for open-drain by the each pin’s input/output control reg-
The MISO pin of a slave device becomes an output when the SECR<SEE> bit is set to 1 (SEI operation en-
The SS pin function differently when the SEI is the master and when it is a slave.
When the SEI is a slave, this pin is used to enable the SEI transmission/reception. When the slave’s SS
SCLK pin
MISO/MOSI pins
SS pin
Note:Noise in a slave device’s SCLK input may cause the device to operate erratically.
Table 11-3 MISO/MOSI Pin Status
Master
Slave
Page 113
Output
MISO
Input
Output
MOSI
Input
TMP86FH09AMG