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參數(shù)資料
| 型號(hào)： | ZPSD503B1V-C-20UI |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Low Cost Field Programmable Microcontroller Peripherals |
| 中文描述： | 低成本現(xiàn)場(chǎng)可編程微控制器外圍設(shè)備 |
| 文件頁(yè)數(shù)： | 17/153頁(yè) |
| 文件大小： | 1036K |
| 代理商： | ZPSD503B1V-C-20UI |
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PSD5XX Famly
14
9.1.1 The DPLD
The DPLD is used for internal address decoding generating the following eight
chip select signals:
J
ES0 – ES3
EPROM selects, block 0 to block 3
J
RS0
SRAM block select
J
CSIOP
I/O Decoder chip select
J
PSEL0 – PSEL1
Peripheral I/O mode select signals
The I/O Decoder enabled by the CSIOP generates chip selects for on-chip registers or I/O
ports based on address inputs A[7:0].
As shown in Figure 5, the DPLD consists of a large programmable AND ARRAY. There are
a total of 61 inputs and 8 outputs. Each output consists of a single product term. Although
the user can generate select signals from any of the inputs, the select signals are typically a
function of the address and Page Register inputs. The select signals, which are active High,
are defined by the user in the ABEL file (PSDabel).
The address line inputs to the DPLD include A0, A1 and A8 – A15. If more address lines
are needed, the user can bring in the lines through Port A to the DPLD.
9.1.2 The GPLD
The structure of the General Purpose PLD consists of a programmable AND ARRAY and
3 sets of I/O Macrocells. The ARRAY has 61 input signals, same as the DPLD. From these
inputs, “ANDed” functions are generated as product term inputs to the macrocells. The I/O
Macrocell sets are named after the I/O Ports they are linked to, e.g., the macrocells
connected to Port A are named PA Macrocells. The 3 sets of macrocells, PA, PB and PE,
are similar in structure and function.
Figure 6 shows the output/input path of a GPLD macrocell to the Port pin with which it is
associated. If the Port pin is specified as a GPLD output pin in PSDsoft, the MUX in the I/O
Port Cell selects the GPLD macrocell as an output of the Port pin. The output enable signal
to the buffer in the I/O cell can be controlled by a product term from the AND ARRAY.
If the Port pin is specified as a ZPLD input pin, the MUX in the GPLD macrocell selects the
Port input signal to be one of the 61 signals in the ZPLD Input Bus.
The PSD5XX
Architecture
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| ZPSD512B1-C-90UI | 制造商:WSI 功能描述: |
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| ZPSD602E1-15L | 制造商:WSI 功能描述: |
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