w83637hg Winbond Electronics Corp America, w83637hg Datasheet - Page 92

• Manufacturer Part Number: w83637hg
• Description: Winbond Lpc I/o Lpc I/o
• Manufacturer: Winbond Electronics Corp America

Bit 7, 6: FIFO enabled status bits reflect what is set in bit 0 of SCFR (write only Smart Card FIFO
Bit 5: SCPSNT line status. User may poll this bit to see SCPSNT pin's voltage level.
Bit 4: SCPTI means SCPSNT toggle interrupt status. A rising/falling edge of SCPSNT signal triggers
Bit 3 ~ 1: INTS2 ~ INTS0 mean interrupt status bit 2 ~ 0. The combination indicates which kind of
Bit 0: Interrupt pending status bit. This bit is a logical "1" if there is no interrupt pending. If one of the
3
0
0
0
1
0
ISR bit
2
0
1
1
1
0
an interrupt and set this status bit if ESCPTI (IER bit 3) is set to "1" to enable SCPSNT toggle
interrupt.
interrupt sources occurs, this bit will be set to a logical "0".
= 0
= 1
= 0
= 1
Register at base address + 2 when BDLAB = 0).
transmission-related interrupt has occurred. Refer to the following table for details.
1
0
1
0
0
1
0
1
0
0
0
0
No SCPSNT toggle interrupt.
SCPSNT toggle interrupt occurs.
Interrupt pending.
No interrupt occurs.
second RBR data ready
second FIFO data time out
Priority
third
first
-
Data receiving status
TBR empty
Interrupt type
-
Interrupt set and function
Interrupt source
No interrupt pending
1. OER = 1
2. PBER = 1
3. NSER = 1
4. SBD = 1
1. RBR data ready
2. FIFO interrupt active
Data present in Rx
FIFO for 4-character
period of time since last
access of Rx FIFO.
TBR empty
- 87 -
level reached
Publication Release Date: March, 2006
W83637HF/HG
Read SCSR
1. Read RBR
2. Read RBR until FIFO
Read RBR
1. Write data to TBR
2. Read ISR (if priority is
Clear interrupt condition
is under active level
third)
-
Revision 1.6