W83637HF Datasheet, PDF (90/149 Pages) Winbond – LPC I/O

W83637HF
Interrupt Enable Register (IER at base address + 1 when BDLAB = 0)
This register includes four control bits to enable interrupt events. The other four bits are allocated for
control of general-purpose I/O pins which are usually connected to C4 and C8 pads of a smart card for
application specific function.
7 6 5 4 32 1 0
ERDRI
ETBREI
ESCSRI
ESCPTI
SCC4_IO
SCC8_IO
SCC4
SCC8
Bit 7: SCC8 means Smart Card C8 pad. When SCC8_IO (bit 5) is set to "0" for output mode, this bit
controls the voltage level of SCC8 pin which is high when SCC8 is set to "1" and low for setting
of "0". Its value reflects what could be observed on SCC8 pin when SCC8_IO is set to "1" for
input mode with the same convention as in output mode.
Bit 6: SCC4 means Smart Card C4 pad. When SCC4_IO (bit 4) is set to "0" for output mode, this bit
controls the voltage level of SCC4 pin which is high when SCC4 is set to "1" and low for setting
of "0". Its value reflects what is observed on SCC4 pin when SCC4_IO is set to "1" for input
mode with the same convention as in output mode.
Bit 5: SCC8_IO means input/output direction control for SCC8 pin.
= 0 SCC8 is in output mode.
= 1 SCC8 is in input mode.
Bit 4: SCC4_IO means input/output direction control for SCC4 pin.
= 0 SCC4 is in output mode.
= 1 SCC4 is in input mode.
Bit 3: ESCPTI means SCPSNT toggle interrupt enable bit. A rising/falling edge of SCPSNT signal
triggers an interrupt if this bit is set to "1".
= 0 SCPSNT toggle interrupt is disabled.
= 1 SCPSNT toggle interrupt is enabled.
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Publication Release Date: June 25, 2003
Revision 1.3