15 Quad Synchronous Serial Interface (QSPI)
S1C31D50/D51 TECHNICAL MANUAL
Seiko Epson Corporation
15-33
(Rev. 2.00)
Bit 3
OEIF
Bit 2
TENDIF
Bit 1
RBFIF
Bit 0
TBEIF
These bits indicate the QSPI interrupt cause occurrence status.
1 (R):
Cause of interrupt occurred
0 (R):
No cause of interrupt occurred
1 (W):
Clear flag (OEIF, TENDIF)
0 (W):
Ineffective
The following shows the correspondence between the bit and interrupt:
QSPI_
n
INTF.OEIF bit:
Overrun error interrupt
QSPI_
n
INTF.TENDIF bit: End-of-transmission interrupt
QSPI_
n
INTF.RBFIF bit: Receive buffer full interrupt
QSPI_
n
INTF.TBEIF bit: Transmit buffer empty interrupt
QSPI Ch.
n
Interrupt Enable Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
QSPI_nINTE
15–8 –
0x00
–
R
–
7–4 –
0x0
–
R
3
OEIE
0
H0
R/W
2
TENDIE
0
H0
R/W
1
RBFIE
0
H0
R/W
0
TBEIE
0
H0
R/W
Bits 15–4 Reserved
Bit 3
OEIE
Bit 2
TENDIE
Bit 1
RBFIE
Bit 0
TBEIE
These bits enable QSPI interrupts.
1 (R/W): Enable interrupts
0 (R/W): Disable interrupts
The following shows the correspondence between the bit and interrupt:
QSPI_
n
INTE.OEIE bit:
Overrun error interrupt
QSPI_
n
INTE.TENDIE bit: End-of-transmission interrupt
QSPI_
n
INTE.RBFIE bit: Receive buffer full interrupt
QSPI_
n
INTE.TBEIE bit: Transmit buffer empty interrupt
QSPI Ch.
n
Transmit Buffer Empty DMA Request Enable Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
QSPI_nTBEDMAEN 15–0 TBEDMAEN[15:0]
0x0000
H0
R/W –
Bits 15–0 TBEDMAEN[15:0]
These bits enable the QSPI to issue a DMA transfer request to the corresponding DMA channel (Ch.0–
Ch.15) when a transmit buffer empty state has occurred.
1 (R/W): Enable DMA transfer request
0 (R/W): Disable DMA transfer request
Each bit corresponds to a DMA controller channel. The high-order bits for the unimplemented chan-
nels are ineffective.