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: 52/100页
文件大小: 1547K
代理商: B900J24PXX12I
Lucent Technologies Inc.
55
Advance Data Sheet
B900
July 1999
Baseband Signal Processor
5 Software Architecture (continued)
5.2
Register Settings (continued)
* iopucd[15:12] and iopucd[7:4] are reserved. These bits should only be written with 0.
Notes:
For all IOP ports, when both IOPU
n = 1 and IOPDn = 1, a strong pull-up option is enabled for the corresponding IOP.
IOPB1 and IOPB3 have no internal pull-up or pull-down capability.
Table 44. IOPUC<a—d> Register Fields*
Bit
15—8
7—0
Field
IOPU[7:0]
IOPD[7:0]
Bit
Field
Description
15—8
IOPU[7:0]
IOPU[7:0] pull-up control:
0 = no pull-up resistor.
1 = pull-up IOP pin when configured as an input.
7—0
IOPD[7:0]
IOPD[7:0] pull-down control:
0 = no pull-down resistor.
1 = pull-down IOP pin when configured as an input.
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