19 UNIVERSAL SERIAL INTERFACE WITH LCD INTERFACE (USIL)
19-42
Seiko Epson Corporation
S1C33L26 TECHNICAL MANUAL
Note: This register is effective only in I
2
C slave mode. Configure USIL to I
2
C slave mode before this reg-
ister can be used.
D[7:5]
Reserved
D4
ISTG: I
2
C Slave Operation Trigger Bit
Starts an I
2
C slave operation.
1 (W):
Trigger
0 (W):
Ignored
1 (R):
Waiting for starting operation
0 (R):
Trigger has finished (default)
Select an I
2
C slave operation using ISTGMOD[2:0] and write 1 to ISTG as the trigger. The I
2
C control-
ler controls the I
2
C bus to generate the specified operating status.
D3
Reserved
D[2:0]
ISTGMOD[2:0]: I
2
C Slave Trigger Mode Select Bits
Selects an I
2
C slave operation.
8.5 Trigger List in I
Table 19.
2
C Slave Mode
ISTGMOD[2:0]
Trigger
0x7
Reserved
0x6
ACK/NAK reception
0x5
NAK transmission
0x4
ACK transmission
0x3
Data reception/stop condition detection
0x2
Data transmission
0x1
Reserved
0x0
Wait for start condition
(Default: 0x0)
USIL I
2
C Slave Mode Interrupt Enable Register (USIL_ISIE)
Register name Address
Bit
Name
Function
Setting
Init. R/W
Remarks
USIL I
2
C Slave
Mode Interrupt
Enable Register
(USIL_ISIE)
0x300671
(8 bits)
D7–2 –
reserved
–
–
–
0 when being read.
D1
ISEIE
Receive error interrupt enable
1 Enable
0 Disable
0
R/W
D0
ISIE
Operation completion int. enable
1 Enable
0 Disable
0
R/W
Note: This register is effective only in I
2
C slave mode. Configure USIL to I
2
C slave mode before this reg-
ister can be used.
D[7:2]
Reserved
D1
ISEIE: Receive Error Interrupt Enable Bit
Enables interrupt requests to the ITC when an overrun error occurs.
1 (R/W): Enabled
0 (R/W): Disabled (default)
Set this bit to 1 to process overrun errors using interrupts.
D0
ISIE: Operation Completion Interrupt Enable Bit
Enables interrupt requests to the ITC when the triggered operation has completed.
1 (R/W): Enabled
0 (R/W): Disabled (default)
Set this bit to 1 to confirm whether the triggered operation has completed or not using interrupts.