Rainbow Electronics AT83C26 - Manual (Page 31)

31
7511B–SCR–10/05
AT83C26
Several AT83C26 devices can share the same interrupt pin and the micro controller can identify
the interrupt sources by polling the interrupt bits of the AT83C26 devices using TWI commands.
A TWI read command of the interrupt bit corresponding to the IT clears the bit. When all IT bits
are cleared, the INT output becomes high.
The ITDIS register contains 4 bits to control SCn interrupts (n= 2,3,4,5). If ITDISn bit is set, the
flags are set but the INT pin isn’t driven low if an interrupt event appears.
Table 4. Interrupt bits description
Bit name Register name Mask on
INT pin
Remark
INSERT1
INSERT2
VCARD_INT1
VCARD_INT2
VCARD_INT3
VCARD_INT4
VCARD_INT5
VDCB_INT
ICARDERR1
VCARDERR1
VCARDERR2
VCARDERR3
VCARDERR4
VCARDERR5
ATRERR1
ATRERR2
ATRERR3
ATRERR4
ATRERR5
SC1_CFG0
SC2_CFG0
SC1_STATUS
SC2_CFG0
SC3_CFG0
SC4_CFG0
SC5_CFG0
DCDCB
SC1_CFG0
SC1_CFG0
SC2_CFG0
SC3_CFG0
SC4_CFG0
SC5_CFG0
SC1_CFG0
SC2_CFG0
SC3_CFG0
SC4_CFG0
SC5_CFG0
ITDIS2
ITDIS2
ITDIS3
ITDIS4
ITDIS5
ITDIS2
ITDIS3
ITDIS4
ITDIS5
ITDIS2
ITDIS3
ITDIS4
ITDIS5
Smart card inserted/extracted in SC1
Smart card inserted/extracted in SC2
VCARD_OK1 is set
VCARD_OK2 is set
VCARD_OK3 is set
VCARD_OK4 is set
VCARD_OK5 is set
VDCB_OK is set
Over current on DCDCA.
Ouput voltage out of range on DCDCA
Ouput voltage out of range on LDO2
Ouput voltage out of range on LDO3.
Ouput voltage out of range on LDO4
Ouput voltage out of range on LDO5
Error on SC1 for ATR reception in automatic mode
Error on SC2 for ATR reception in automatic mode
Error on SC3 for ATR reception in automatic mode
Error on SC4 for ATR reception in automatic mode
Error on SC5 for ATR reception in automatic mode