Epson S1C33210 - Manual (Page 220)

II CORE BLOCK: ITC (Interrupt Controller)
B-II-5-22 EPSON S1C33210 FUNCTION PART
SIO2TS0: SIO Ch.2 transmit-buffer empty/FP3 interrupt factor switching
(D3) / Interrupt factor FP function switching register (0x402C5)
Switches the interrupt factor.
Write "1": SIO Ch.2 transmit-buffer empty
Write "0": FP3 input
Read: Valid
Set to "1" to use the SIO Ch.2 transmit-buffer empty interrupt.
Set to "0" to use the FP3 input interrupt.
At power-on, this bit is set to "0".
SIO3RS0: SIO Ch.3 receive-buffer full/FP4 interrupt factor switching
(D4) / Interrupt factor FP function switching register (0x402C5)
Switches the interrupt factor.
Write "1": SIO Ch.3 receive-buffer full
Write "0": FP4 input
Read: Valid
Set to "1" to use the SIO Ch.3 receive-buffer full interrupt.
Set to "0" to use the FP4 input interrupt.
At power-on, this bit is set to "0".
T8CH4S0: 8-bit timer 4 underflow/FP5 interrupt factor switching
(D5) / Interrupt factor FP function switching register (0x402C5)
Switches the interrupt factor.
Write "1": 8-bit timer 4 underflow
Write "0": FP5 input
Read: Valid
Set to "1" to use the 8-bit timer 4 underflow interrupt.
Set to "0" to use the FP5 input interrupt.
At power-on, this bit is set to "0".
SIO3TS0: SIO Ch.3 transmit-buffer empty/FP6 interrupt factor switching
(D6) / Interrupt factor FP function switching register (0x402C5)
Switches the interrupt factor.
Write "1": SIO Ch.3 transmit-buffer empty
Write "0": FP6 input
Read: Valid
Set to "1" to use the SIO Ch.3 transmit-buffer empty interrupt.
Set to "0" to use the FP6 input interrupt.
At power-on, this bit is set to "0".
T8CH5S0: 8-bit timer 5 underflow/FP7 interrupt factor switching
(D7) / Interrupt factor FP function switching register (0x402C5)
Switches the interrupt factor.
Write "1": 8-bit timer 5 underflow
Write "0": FP7 input
Read: Valid
Set to "1" to use the 8-bit timer 5 underflow interrupt.
Set to "0" to use the FP7 input interrupt.
At power-on, this bit is set to "0".