EZ-USB TRM v1.9 Chapter 9. EZ-USB Interrupts Page 9-15
Figure 9-11. I
2
CModeRegister
The I
2
C interrupt includes one additional interrupt source in the AN2122/AN2126, a 1-0
transition of the STOP bit. To enable this interrupt, set the STOPIE bit in the I2CMODE
register. The 8051 determines the interrupt source by checking the DONE and STOP bits
in the I2CS register.
Figure 9-12. I
2
C Control and Status Register
Figure 9-13. I
2
CData
9.14 I
2
C STOP Complete Interrupt - (AN2122/AN2126 only)
I2CMODE
I
2
C Mode
7FA7
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 0 STOPIE 0
R R R R R R R/W R
0 0 0 0 0 0 0 0
I2CS
I
2
C Control and Status
7FA5
b7 b6 b5 b4 b3 b2 b1 b0
START STOP LASTRD ID1 ID0 BERR ACK DONE
R/W R/W R/W R R R R R
0 0 0 X X 0 0 0
I2DAT
I
2
C Data
7FA6
b7 b6 b5 b4 b3 b2 b1 b0
D7 D6 D5 D4 D3 D2 D1 D0
R/W R/W R/W R/W R/W R/W R/W R/W
x x x x x x x x
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