17 Parallel Interface (PIO)
S1C17F13 TeChniCal Manual
Seiko epson Corporation
17-7
(Rev. 1.0)
Bits 7–0
PRDaTa[7:0]
Input data can be read through these bits. Before reading this register, issue a read trigger (PIOCTL.
RACC bit = 1) and wait until the read cycle has finished (PIOSTAT.RBUSY bit changes 1 to 0).
PiO Status Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
PIOSTAT
15–8 –
0x00
–
R
–
7–2 –
0x00
–
R
1
WBUSY
0
H0/S0
R
0
RBUSY
0
H0/S0
R
Bits 15–2 Reserved
Bit 1
WBuSY
This bit indicates the write cycle operating status.
1 (R):
Write cycle is being executed.
0 (R):
Idle
Bit 0
RBuSY
This bit indicates the read cycle operating status.
1 (R):
Read cycle is being executed.
0 (R):
Idle