Inc. Computer Accessories User Manual

Simulation
XAPP979 (v1.0) February 26, 2007 www.xilinx.com 25
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In most cases, after data is transmitted, the test waits for an interrupt from the OPB IIC.
Internal signal names used in the OPB IIC core are provided in Ta ble 6.
Figure 28: OPB IIC Simulation
Table 6: Internal Signals in OPB IIC
Signal Name Functionality
Txak Transmit acknowledge
Gc_en General call address enbale
Ro_prev Receive overrun prevent
Dtre Data transmit register empty
Msms Master/Slave select
Dtr(7:0) Data Transmit Register
Adr(7:0) IIC Slave Address Register
Ten_adr(7:5) 10-bit Slave Address Register
Bb Bus Busy
Aas Addressed as slave
Al Arbitration lost
Srw Slave read/write
Abgc Addressed by general call
Data_iic(7:0) IIC data for microprocessor
New_rcv_data New data received on IIC bus
Tx_under_prev Transmit FIFO Empty IRQs
slave_sda SDA value when slave
master_sda SDA value when master
sm_stop Stop condition needs to be generated
rsta_tx_under_prev Repeated start Tx underflow prevent
BFM
IIC_20
Base Address
0xE0000000
Base Address
0xE1000000
IIC_AA
X979_28_012907
SCL
SDA