PSD413A1 datasheet(52/123 Pages) STMICROELECTRONICS

52 / 123 page

PSD4XX Family

9.3.3 Address Out

For microcontrollers with a multiplexed address/data bus, the I/O ports in Address-Out

mode are able to provide latched address outputs (A0 – A15) to external devices. This

mode of operation requires the user to:

t Configuration

1. Declare the pins used as address line outputs in the ABEL file (PSDsoft).

2. Write “0” to the corresponding bit in the Control Register associated with each

I/O port.

3. Set the Direction Register to Output Mode.

9.3.4 Address In

There are two Address In modes:

1. For Port A - as other address line (A2-A7 and A16-A23) inputs to the DPLD. Additional

address inputs included in the EPROM decoding must come from Port A. The address

inputs are latched internally by ALE/AS if Multiplexed Bus is specified in PSDsoft.

2. For Ports C and D – as address inputs to the ZPLD for general decoding,

should not be used in EPROM decoding.

t Configuration

1. Declare pins or signals used as Address In in the ABEL file (PSDsoft).

2. Write latch equations in the .ABL file, e.g., A16.LE = ALE.

3. Include latched address in logic equations.

9.3.5 Data Port

In this mode, the port is acting as a data bus port for a microcontroller which has a

non-multiplexed address/data bus. The Data Port is connected to the data bus of the

microcontroller and the ADIO port is connected to the address bus.

t Configuration

Select the non-multiplexed bus option in PSD configuration (PSDsoft).

9.3.6 Alternate Function In

This mode is per-pin configurable and enables the user to define pin PE7 of Port E as

Automatic Power Down (APD) CLK input.

t Configuration

1. Select input functions in PSD configuration.

2. PSD Compiler assigns pins for the selected options.

The PSD4XX

Architecture

(cont.)

PSD413A1 数据表(PDF) 52 Page - STMicroelectronics

PSD413A1 数据表(HTML) 52 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载

链接网址

PSD413A1 数据表(PDF) 52 Page - STMicroelectronics

PSD413A1 数据表(HTML) 52 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表 下载

链接网址

数据表下载