3-36
PCS-1500/1500P
I-interface
LSI
HD81504
TA2
Modular
Jack
8p
EMI
Filter
256Kbit
SRAM
MA-97 Interface
Address
Decoder
&
Bus
Controller
TB2
RB2
RA2
LTA2
LTB2
LRB2
LRA2
ISDN firmware
is downloaded
256Kbit
SRAM
[2D0..7]
[2A0..14]
[2A0..13]
T102
FL100
T101
CN100
IC100
IC102
IC101
I-interface
LSI
HD81504
TA3
Modular
Jack
8p
EMI
Filter
256Kbit
SRAM
TB3
RB3
RA3
LTA3
LTB3
LRB3
LRA3
ISDN firmware
is downloaded
256Kbit
SRAM
T202
FL200
T201
CN200
IC200
IC202
IC201
Data &
Address
Set
Block
IC312
[2D0..7]
[2A0..14]
Buffer
[OP_HD0..7]
[OP_HA1..3]
IC106,107,109
IC206,207,209
CN300
Buffer
TBA_BRI2, TBB_BRI2
RBA_BRI2, RBB_BRI2, CK8K_BRI2, CK64K_BRI2
TBA_BRI3, TBB_BRI3
RBA_BRI3, RBB_BRI3, CK8K_BRI3, CK64K_BRI3
[OHA4..5]
[OP_HD0..7]
[OP_HD0..7]
[2D0..7]
[2D0..7]
[2D0..7]
[2A0..14]
[2A0..13]
IC301, IC304
IC300, IC301
HOST I/F
Control
Receive Call
Detection
& Memory Check
Block
RAMCS,
2A12,
2A13,
IC103,104,105
IC203,204,205
IC306
SDET2, SDET3, SRAMCHK2, SRAMCHK3
NETOPINT
Fig. 3-21 IF-744 Board Block Diagram
3-2. Circuit Description of the Respective Boards
Summary of Contents for PCS-1500
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