![](http://datasheet.mmic.net.cn/380000/-PD98405_datasheet_16745025/-PD98405_297.png)
CHAPTER 7 REGISTERS
297
(2) GSR (general status register)
Address:
01H
Access mode: Read only
The GSR register indicates the source of an interrupt. When an internal interrupt occurs, the
corresponding bit of this register is set to 1. If the interrupt is unmasked by the corresponding bit of
interrupt mask register IMR, the interrupt occurs. This register is cleared when it is read by the host. If the
same source issues another interrupt before the register is cleared, the contents of the register are
overwritten with 1.
31
29
8
0
30
7
16
15
0
RCR(7:0)
MF(3:0)
RQU
PI RQA
MM(3:0)
28
4
3
27
25
26
24
20
21
22
23
CPE
RD SPE
SBE
PERFER
0
IND
MIB(3:0)
17
Field
Function
Value after reset
PI
Interrupt from PHY layer.
'1' indicates that an interrupt has been received from the internal PHY layer,
or that a low-level signal has been input from the externally connected PHY
layer device to the PHINT_B pin, thus causing an interrupt.
Receive buffer alert.
Indicates the existence of a pool for which "REMAINING NO. OF
BATCHES IN THE POOL" of pool descriptor exceeds "ALERT LEVEL".
The host reads the RQA register to check in which pool this error has
occurred.
Receive free buffer underflow.
Indicates the existence of a pool for which "REMAINING NO. OF
BATCHES IN THE POOL" of pool descriptor is 0 (there is no unused
batch). The host reads the RQU register to determine in which pool this
error has occurred.
Receiver deactivate complete.
'1' indicates that the execution of global shutdown has been completed and
that reception function has stopped.
Bus parity error detection.
'1' indicates detection of parity error on host bus interface.
This bit is valid only in Generic mode. This interrupt is not generated in PCI
mode.
Control memory interface parity error detection.
'1' indicates detection of parity error on control memory interface.
Bus error detection.
'1' indicates low level is input to ERR_B input pin.
This bit is valid only in Generic mode. This interrupt is not generated in PCI
mode.
Control memory initialization complete.
'1' indicates completion of control memory initialization by
μ
PD98405
after reset. About 32K system clocks must elapse between the
μ
PD98405 being reset and this bit being set. During this period, host
can only access direct address registers of
μ
PD98405 other than
command register.
0
RQA
0
RQU
0
RD
0
SPE
Note
0
CPE
0
SBE
Note
0
IND
0
Note
These fields are valid only in Generic mode.