Rainbow Electronics W90P710CDG - Manual (Page 446)

W90P710CD/W90P710CDG
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BITS DESCRIPTIONS
[31:6] RESERVED -
[5] SCPSNT
Smart card present line status.
User may poll this bit to see SCPSNT pin's voltage level
0 = Smart card has been remove from the reader
1 = Smart card IC is contact with the reader
[4] SCPTI
SCPSNT toggle interrupt status.
A rising/falling edge of SCPSNT signal triggers an interrupt and set this
status bit if ESCPTI (IER bit 3) is set to "1" to enable SCPSNT toggle
interrupt.
0= No SCPSNT toggle interrupt.
1 = SCPSNT toggle interrupt occurs.
[3:1]
INTS2 ~
INTS0
Interrupt Status bit 2 ~0
The combination indicates which kind of transmission-related interrupt has
occurred. Refer to the following table for details.
ISR bit Interrupt set and function
3 2 1 0 Priority Interrupt
type
Interrupt source Clear interrupt condition
0 0 0 1 - - No interrupt pending -
1 0 1 0 first Card
insert or
remove SCPTI =1 Read ISR
1 1 1 0 second TIME-
OUT
interrupt
1. TO2 =1
2. TO1 =1
3. TO0 =1 Read SCSR
0 1 1 0 third Data
receiving
status
1. OER = 1
2. PBER = 1
3. NSER = 1
4. SBD = 1 Read SCSR
0 1 0 0 fourth RBR
data
ready
1. RBR data ready
2. FIFO interrupt active
level reached
1. Read RBR
2. Read RBR until FIFO
is under active level
1 1 0 0 fifth FIFO
data time
out Receiver FIFO is non-
empty and no activities
are occurred in the
receiver FIFO during
the TOR defined time
duration Read RBR
0 0 1 0 sixth TBR
empty
TBR empty 1. Write data to TBR
2. Read ISR (if priority is
sixth)
[0]
Interrupt
pending
Interrupt pending status bit.
This bit is a logical "1" if there is no interrupt pending. If one of the interrupt
sources occurs, this bit will be set to a logical "0".
0 = Interrupt pending.
1 = No interrupt occurs.