82527 Datasheet, PDF (5/22 Pages) Intel Corporation – SERIAL COMMUNICATIONS CONTROLLER CONTROLLER AREA NETWORK PROTOCOL

82527
Pin Name
AD0 A0 ICP
AD1 A1 CP
AD2 A2 CSAS
AD3 A3 STE
AD4 A4 MOSI
AD5 A5
AD6 A6 SCLK
AD7 A7
AD8 D0 P1 0
AD9 D1 P1 1
AD10 D2 P1 2
AD11 D3 P1 3
AD12 D4 P1 4
AD13 D5 P1 5
AD14 D6 P1 6
AD15 D7 P1 7
P2 0
P2 1
P2 2
P2 3
P2 4
P2 5
P2 6 INT
P2 7 WRH
Mode0
Mode1
ALE AS
RD
E
WR WRL
RW
READY
MISO
DSACK0
Pin Type
I O-I-I
I O-I-I
I O-I-I
I O-I
I O-I-I
I O-I
I O-I-I
I O-I
I O-O-I O
I O-O-I O
I O-O-I O
I O-O-I O
I O-O-I O
I O-O-I O
I O-O-I O
I O-O-I O
IO
IO
IO
IO
IO
IO
I O-O
I O-I
I
I
I-I
I
I
I
I
O
O
O
Pin Description
Address Data bus in 8-bit multiplexed mode
Address bus in 8-bit non-multiplexed mode
Low byte of A D bus in 16-bit multiplexed mode
In Serial Interface mode the following pins have the following meaning
AD0 ICP
Idle Clock Polarity
AD1 CP
Clock Phase
AD2 CSAS Chip Select Active State
AD3 STE Sync Transmit Enable
AD6 SCLK Serial Clock Input
AD4 MOSI Serial Data Input
High byte of A D bus in 16-bit multiplexed mode
Data bus in 8-bit non-multiplexed mode
Low speed I O port P1 pins in 8-bit multiplexed mode and serial mode
Port pins have weak pullups until the port is configured by writing to 9FH
and AFH
P2 in all modes
P2 6 is INT when MUX ^e 1 and is open-drain
P2 7 is WRH in 16-bit multiplexed mode
These pins select one of the four parallel interfaces These pins are
weakly held low during reset
Mode1 Mode0
0
0
8-bit multiplexed Intel
0
0
Serial Interface mode entered when RD ^e 0
WR ^e 0 upon reset
0
1
16-bit multiplexed Intel
1
0
8-bit multiplexed non-Intel
1
1
8-bit non-multiplexed
ALE used for Intel modes
AS used for non-Intel modes except Mode 3 this pin must be tied high
RD used for Intel modes
E used for non-Intel modes except Mode 3 Asynchronous this pin must
be tied high
WR in 8-bit Intel mode and WRL in 16-bit Intel mode
R W used for non-Intel modes
READY is an output to synchronize accesses from the host
microcontroller to the 82527 READY is an open-drain output to the host
microcontroller MISO is the serial data output for the serial interface
mode
DSACK0 is an open-drain output to synchronize accesses from the host
microcontroller to the 82527
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