
21 IRDA
S1C38000 TECHNICAL MANUAL
EPSON
197
bit 15
Echo Status
When this bit reads 1, echo mode is enabled. When this reads 0 echo mode is disabled.
bits 14–12 reserved
These bits are reserved and always read 0.
bits 10–9
reserved
These bits are reserved and always read 11b.
bit 8
SIP Transmit Status
When this bit reads 1, SIP transmission is in progress. When this bit reads 0, SIP
transmission is not in progress.
bits 7–0
Device Version Number Bits [7:0]
These bits are the Device Version Number and always read 06h.
bit 15
reserved
This bit is reserved and must be set to 1.
bits 14–13 reserved
These bits are reserved and must be set to 0.
bit 12
reserved
This bit is reserved and must be set to 1.
bit 11
Timer Enable
When this bit is written 1, the Timer is enabled and counts down from the initial value
loaded into register IRDA[18h]. When this bit is written 0, the timer circuit is reset and
the timer counter is set to the initial value from register IRDA[18h]. The count down
does not start.
bit 10
reserved
This bit is reserved and must be set to 0.
bit 9
Timer Speed Select
When this bit is written 1, the timer is set to count every 1 microsecond. When this bit is
written 0, the timer is set to count every 10 microseconds.
bit 8
Loop Back Mode
When this bit is written 1, Loop Back Mode is enabled. The receive circuit receives the
transmission signal as receiver IR data. The inputs from the IRRXD signal is ignored.
When this bit is written 0, Normal Mode is enabled. The receive circuit receives IR data
from the IRRXD signal.
IrDA System Status Register 1
IRDA[10h]
Default = 0000 0606h
Read Only
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Echo
Status
reserved
n/a
reserved
SIP
Transmit
Status
Device Version Number
15
14
13
12
11
10
9876543210
IrDA System Control Register 2
IRDA[14h]
Write Only
n/a
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Timer
Enable
reserved
Timer
Speed
Select
Loop
Back
Mode
IrDA FIR
Modulator
Select
reserved
IrDA SIR
Modulator
Select
reserved
IrDA FIR
Demodu-
lator
Select
reserved
IrDA SIR
Demodu-
lator
Select
reserved
15
14
13
12
11
10
9876543210