MCS9845 MosChip Semiconductor, MCS9845 Datasheet - Page 7

• Manufacturer Part Number: MCS9845
• Description: PCI Dual UART
• Manufacturer: MosChip Semiconductor

Rev. 2.5
IRQ5-2
nIRQ6
D7-D4
D3-D0
Name
nCDB
nCS3
nCS4
nCS5
nCS6
nIOW
nRST
nIOR
nRIB
GND
A0-2
RST
Vcc
82,89,104,
94,99,108
33,44,45,
60,77,88,
39,54,66,
7,20,21,
119,125
1,10,19,
84-87
63-65
98-95
93-90
103
102
101
100
Pin
114
70
69
83
81
80
79
78
Type
Pwr
Pwr
I/O
I/O
O
O
O
O
O
O
O
O
O
I
I
I
I
UART-B Carrier-Detect signal.
When low, this indicates the modem or data set has detected the Data Carrier.
nCDB has no effect on the transmitter.
UART-B ring-detect signal.
Chip Select 3 (Active-Low).
Chip Select 4 (Active-Low).
Chip Select 5 (Active-Low).
Chip Select 6 (Active-Low).
Active-High Interrupt inputs.
All unused interrupts must be connected to GND for proper operation.
Active-Low Interrupt input.
This pin should be tied to Vcc if it is not used.
External Peripheral Read signal (Active-Low).
External Peripheral Write signal (Active-Low).
External Peripheral Reset Signal (Active-High).
External Peripheral Reset Signal (Active-Low).
External Peripheral Address Lines.
External Peripheral Data Bus.
External Peripheral Data Bus.
Power and signal ground.
Supply. Voltage
PCI Dual UART with ISA Bridge
Description
MCS9845
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Page 7