MCS9845 MosChip Semiconductor, MCS9845 Datasheet - Page 2

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

Page 2
nC/BE0, nC/BE1,
nC/BE2, nC/BE3
MCS9845
PCI Dual UART with ISA Bridge
nFRAME, nIRDY
nLOCK, IDSEL,
nTRDY, nSTOP,
nDEVSEL,
nPARR,nSERR
AD0 - AD31
nRESET
nINTA
CLK
C
N
R
A
C
P
E
E
T
F
I
I
EEPROM
Interface
G
C
B
R
D
P
E
I
I
Block Diagram
Serial Port-A
Serial Port-B
Clock Circuit
Bridge
ISA
D0 - D7
TXA
nRTSA, nDTRA
RXA
nCTSA, nDSRA, nCDA, nRIA
ACLK
12XCLK
6XCLK
3XCLK
TXB
nRTSB, nDTRB
RXB
nCTSB, nDSRB, nCDB, nRIB
BCLK
nIOR
nIOW
nRST, RST
nCS3 - nCS6
IRQ2 - IRQ5
nIRQ6
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Rev.
2.5