Flash/Bootprom/Eeprom/Mii Interface - Realtek RTL8169 Manual

M66EN I
PERRB S/T/S
SERRB O/D
STOPB S/T/S
RSTB I

5.3 FLASH/BootPROM/EEPROM/MII Interface

Symbol Type
MA[16:9], MA7, O
MA[5:3]
MA8 O, I
MA6 O, I
MA2/EESK O
MA1/EEDI O
MA0/EEDO O, I
EECS O
MD7-0 I/O
ROMCSB O
OEB O
WEB O
2002/03/27
173
66MHZ_ENABLE: This pin indicates to the RTL8169 whether the bus
segment is operating at 66 or 33MHz. When this pin (active high) is
asserted, the current PCI bus segment that the RTL8169 resides on
operates in 66-MHz mode. If this pin is deasserted, the current PCI bus
segment operates in 33-MHz mode.
1
Parity Error: This pin is used to report data parity errors during all PCI
transactions except a Special Cycle. PERRB Is driven active (low) two
clocks after a data parity error is detected by the device receiving data,
and the minimum duration of PERRB is one clock for each data phase
with parity error detected.
3 System Error: If an address parity error is detected and Configuration
Space Status register bit 15 (detected parity error) is enabled, the
RTL8169 asserts the SERRB pin low and bit 14 of Status register in
Configuration Space.
208 Stop: Indicates that the current target is requesting the master to stop the
current transaction.
175 Reset: When RSTB is asserted low, the RTL8169 performs an internal
system hardware reset. RSTB must be held for a minimum of 120 ns
periods.
Pin No
112-109, 107, Boot PROM Address Bus: These pins are used to access up to a
105-104, 102, 100,
128k-byte flash memory or EPROM.
97-95
MA16-3: Output pins to the Boot PROM address bus.
MA8: Input pin as Aux. Power detect pin to detect if Aux. Power exists
or not, when initial power-on. Besides connecting this pin to Boot
101
PROM, it should be pulled high to the Aux. Power via a resistor to
detect Aux. power. If this pin is not pulled high to Aux. Power, the
RTL8169 assumes that no Aux. power exists. To support wakeup from
ACPI D3cold or APM power-down, this pin must be pulled high to aux.
power via a resistor.
MA6/9356SEL: Input pin as 9356 select pin at initial power-up. When
this pin is pulled high with a 10KΩ resistor, the 93C56 EEPROM is
used to store the resource data and CIS for the RTL8169. The RTL8169
99
latches the status of this pin at power-up to determine what EEPROM
(93C46 or 93C56) is used, afterwards, this pin is used as MA6
92 MA2-0: The MA2-0 pins are switched to EESK, EEDI, EEDO in
93C46 (93C56) programming or auto-load mode.
91
90
93 EEPROM Chip Select: 93C46 (93C56) chip select
119, 121-127 Boot PROM data bus during Boot PROM mode.
128 ROM Chip Select: This is the chip select signal of the Boot PROM.
130 Output Enable: This enables the output buffer of the Boot PROM or
Flash memory during a read operation.
129
Write Enable: This signal strobes data into the Flash memory during a
write cycle.
Description
9
RTL8169
Rev.1.21