TC9205M
Preliminary Data Sheet
Pin Listing (continued)
No.
Pin label
Type
Description
U18 RxData4_6
Is
GMII receive data - most significant nibble
U19 RxData4_7
Is
GMII receive data - most significant nibble
D14 Vdd 3.3
P
Digital +3.3V power supply for I/O
E19 FullBp
Ipd
In normal operation the backpressure process is executed until flow
control condition disappears or until the time limit for backpressure is
reached. This limit is based on EEPROM’s BPTimeValue register.
When this configuration is ‘0’ the backpressure process will be also
limited from exceeding 28 consecutive collisions. The default value
(28) can be changed by EEPROM settings.
FullBp is latched on reset
E20 CarrBp
Ipu
Enable / disable carrier based backpressure for half -duplex mode.
'1' – Carrier based backpressure
‘0' – Collision based backpressure.
CarrBp is latched on reset
F18
DisBkPr
Ipd
Setting this pin to ‘1’ will disable backpressure procedure for all half
duplex ports. DisBkPr is latched on reset.
E17 TxEr5
I/Opd Transmit Error
TxData5_3
MII transmit data - bit 3
F20
FrcFdFc
I/Opd
Setting this bit to ‘1’ will force flow control execution for 10/100Mbps,
no matter the auto negotiation result. FrcFdFc is latched on reset.
D10 Vss 3.3
G
Digital ground for I/O
TxData5_2
MII transmit data - bit 2
G20
DisFdFc
I/Opd
Setting this bit to '1' will disable flow-control for full-duplex mode
(transmission of pause frames).
DisFdFc is latched on reset.
G19 TxData5_1
I/pd
MII transmit data - bit 1
G18 TxData5_0
I/pd
MII transmit data - least significant bit
TxEn5
MII transmit enable
E18
DisBPBk
I/Opd
Enable / disable backoff during backpressure.
'1' – No backoff executed. Another collision will be forced again after
one minimum IFG time following previous collision if carrier sense
is observed.
'0' – The MAC randomly chooses between 0 and 1 slot times of backoff.
DisBkBp is latched on reset.
H19 RxEr5
Is
Receive Error
D13 Vdd 2.0
P
Digital +2.0V power supply for core
H18 Txclk5
I
MII transmit clock
D12 Vss 2.0
G
Digital ground for core
J17
RxClk5
I
MII receive clock
H20 RxDv5
Is
MII/MII data valid
M20 Crs5
Is
MII carrier sense indication
M19 Col5
Is
MII collision indication
L20
RxData5_0
Is
MII receive data - least significant nibble.
MII receive data
Confidential.
13/51
July 30, 2003
Copyright © 2003, IC Plus Corp.
TC9205M-DS-R03
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