参数资料
型号: B900J24PXX12I
元件分类: 数字信号处理
英文描述: 0-BIT, 80 MHz, OTHER DSP, PQFP44
文件页数: 4/100页
文件大小: 1547K
代理商: B900J24PXX12I
Advance Data Sheet
B900
July 1999
Baseband Signal Processor
Lucent Technologies Inc.
11
3 Pin Information (continued)
Table 2. B900 Power Supply, Ground, and Unconnected Pins
Table 1. B900 Pinout
Symbol
Pin Number
Type
Active
Pin Description
44-Pin
PLCC
44-Pin
MQFP
DOUT
42
36
O
High
Processor clock; digital output/clock output.
INTB*
* Multiplexed with IOP pins.
11
5
I
Neg
External interrupt, negative edge-triggered; multiplexed with
IOPB0.
IOPA[7:0]
12—17,
20—21
6—11,
14—15
I/O
Pgm
I/O port A (bits 7—0).
IOPB[7:0]
2—5,
8—11
40—43,
2—5
I/O
Pgm
I/O port B (bits 7—0).
IOPC[7:0]
22—27,
30—31
16—21,
24—25
I/O
Pgm
I/O port C (bits 7—0).
IOPD[3:0]
32—35
26—29
I/O
Pgm
I/O port D (bits 3—0).
8
2
I
High
JTAG select. (JTSEL is multiplexed with IOPB3.)
MDISDO*
22
16
I/O
SSI master data in/slave data out; multiplexed with IOPC7.
MDOSDI*
23
17
I/O
SSI master data out/slave data in; multiplexed with IOPC6.
10
4
I
High
Oscillator bypass. (OSCBYP is multiplexed with IOPB1.)
RSTB
43
37
I/O
Low
Reset.
SCK*
24
18
I/O
SSI serial clock; multiplexed with IOPC5.
SSN*
25
19
I
Low
SSI serial slave select; multiplexed with IOPC4.
TCK*
30
24
I
Test clock (JTAG). (TCK is multiplexed with IOPC1.)
TDI*
27
21
I
High
Test data in (JTAG). (TDI is multiplexed with IOPC2.)
26
20
O
High
Test data out (JTAG). (TDO is multiplexed with IOPC3.)
31
25
I
High
Test mode select (JTAG). (TMS is multiplexed with IOPC0.)
CASN*
35
29
O
Low
Column address select. (CASN is multiplexed with IOPD0.)
RASN*
34
28
O
Low
Row address select. (RASN is multiplexed with IOPD1.)
RWN*
33
27
O
High
Read/write not. (RWN is multiplexed with IOPD2.)
XTALA
38
32
I
Crystal oscillator connection.
XTALB
37
31
I/O
Crystal oscillator connection.
SDI*
2
40
I
SIO data in; multiplexed with IOPB7.
3
41
O
SIO data out; multiplexed with IOPB6.
4
42
I/O
SIO shift clock; multiplexed with IOPB5.
SLDA*
5
43
I/O
SIO channel A load clock; multiplexed with IOPB4.
9
3
I/O
SIO channel B load clock; multiplexed with IOPB2.
Symbol
Pin Number
Type
44-Pin PLCC
44-Pin MQFP
VDD
7, 19, 29, 41,
44
1, 13, 23, 35, 38
The B900 can support both 5 V and 3 V.
VSS
1, 6, 18, 28, 36
12, 22, 30, 39, 44 Ground for digital circuitry.
VDDA
40
34
Supply for phase-locked loop (should be connected to VDD).
VSSA
39
33
Ground for phase-locked loop (should be connected to VSS).
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