DS21448 データシートの表示（PDF） - Dallas Semiconductor -> Maxim Integrated
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DS21448 Datasheet PDF : 60 Pages
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DS21448 3.3V T1/E1/J1 Quad Line Interface
2. PIN DESCRIPTION
The DS21448 can be controlled in parallel port mode, serial port mode, or hardware mode. The bus interface select
bits 0 and 1 (BIS0, BIS1) determine the device mode and pin assignments (Table 2-A).
Table 2-A. Bus Interface Selection
BIS1
0
0
1
1
BIS0
0
1
0
1
BUS INTERFACE TYPE
Parallel Port Mode (multiplexed)
Parallel Port Mode (nonmultiplexed)
Serial Port Mode
Hardware Mode
Table 2-B. Pin Assignments
PIN
BGA
LQFP
I/O
J3
18
I
D3
57
I
D10
84
I
K10
114
I
J2
91
I
H1
92
I
K2
95
I
J1
35
I
K3
36
I
K1
62
I/O
L1
63
I
H11
64
I
H12
65
I
G12
66
I
J10
75
I/O
H10
76
I/O
G11
77
I/O
J9
78
I/O
E3
79
I/O
D4
80
I/O
F3
81
I/O
D5
82
I/O
—
3
I
L5
115–117
—
E4
19–21
—
D8
49–51
—
J8
85–87
—
M4
118–120
—
F4
22–24
—
D9
52–54
—
H9
88–90
—
K9
97
I/O
K5
110
O
G3
111
O
E10
121
O
K8
123
O
L6
126
O
D7
128
O
F9
1
O
J7
2
O
K7
98
I
A1
124
I
A4
28
I
A7
60
I
A10
93
I
B2
125
I
B5
29
I
PARALLEL PORT MODE
CS1
CS2
CS3
CS4
RD (DS)
WR (R/W)
ALE (AS)
N/A
N/A
A4
A3
A2
A1
A0
D7/AD7
D6/AD6
D5/AD5
D4/AD4
D3/AD3
D2/AD2
D1/AD1
D0/AD0
VSM
VDD1
VDD2
VDD3
VDD4
VSS1
VSS2
VSS3
VSS4
INT
PBEO1
PBEO2
PBEO3
PBEO4
RCL1/LOTC1
RCL2/LOTC2
RCL3/LOTC3
RCL4/LOTC4
TXDIS/TEST
RTIP1
RTIP2
RTIP3
RTIP4
RRING1
RRING2
SERIAL PORT MODE
CS1
CS2
CS3
CS4
N/A
N/A
N/A
SCLK
SDI
SDO
ICES
OCES
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
VSM
VDD1
VDD2
VDD3
VDD4
VSS1
VSS2
VSS3
VSS4
INT
PBEO1
PBEO2
PBEO3
PBEO4
RCL1/LOTC1
RCL2/LOTC2
RCL3/LOTC3
RCL4/LOTC4
TXDIS/TEST
RTIP1
RTIP2
RTIP3
RTIP4
RRING1
RRING2
HARDWARE MODE
EGL1
EGL2
EGL3
EGL4
ETS
NRZE
SCLKE
L2
L1
L0
DJA
JAMUX
JAS
HBE
CES
TPD
TX0
TX1
LOOP0
LOOP1
MM0
MM1
VSM
VDD1
VDD2
VDD3
VDD4
VSS1
VSS2
VSS3
VSS4
RT1
PBEO1
PBEO2
PBEO3
PBEO4
RCL1
RCL2
RCL3
RCL4
TXDIS/TEST
RTIP1
RTIP2
RTIP3
RTIP4
RRING1
RRING2
7 of 60
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