W90P710CD Datasheet, PDF (446/552 Pages) Winbond – 32-BIT ARM7TDMI-BASED MCU

W90P710CD/W90P710CDG
BITS
[31:6]
[5]
[4]
RESERVED
SCPSNT
SCPTI
DESCRIPTIONS
-
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
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 Interrupt source
Clear interrupt condition
type
000 1 -
1 0 1 0 first
-
No interrupt pending
Card SCPTI =1
insert or
remove
-
Read ISR
111
0 second TIME- 1. TO2 =1
OUT 2. TO1 =1
interrupt _{3. TO0 =1}
Read SCSR
~ ^{0 1 1 0 third Data 1. OER = 1}
receiving 2. PBER = 1
status _{3. NSER = 1}
4. SBD = 1
Read SCSR
010
0 fourth RBR
data
ready
1. RBR data ready 1. Read RBR
2. FIFO interrupt active 2. Read RBR until FIFO
level reached
is under active level
1 1 0 0 fifth
FIFO Receiver FIFO is non-
data time empty and no activities
out
are occurred in the
receiver FIFO during
the TOR defined time
duration
Read RBR
0 0 1 0 sixth TBR TBR empty
empty
1. Write data to TBR
2. Read ISR (if priority is
sixth)
Interrupt pending status bit.
[0]
Interrupt
pending
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.
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