參數(shù)資料
型號： ZPSD512B1-15U
英文描述： Field-Programmable Peripheral
中文描述： 現(xiàn)場可編程外圍
文件頁數(shù)： 43/153頁
文件大?。?/td> 1036K
代理商： ZPSD512B1-15U
PSD5XX Famly
40
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:
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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
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 adress inputs to the ZPLD for general decoding, should not be
used in EPROM decoding.
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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. In this configuration, the Data Port is connected to the
data bus of the microcontroller and the ADIO port is connected to the address bus.
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Configuration
Select the non-multiplexed bus option in PSD configuration (PSDsoft).
9.3.6 Special Function Out
This mode is per-pin configurable. When enabled, the special function assigned to the
particular pin is driven out. Special functions consist of Timer and Interrupt outputs.
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Configuration
1.Specify the output function in the PSD configuration (PSDsoft).
2.PSD compiler assigns pins for the selected function.
3.Write “1” to the corresponding bit in the Special Function Register.
I/OPorts
(Cont.)
相關PDF資料
PDF描述
ZPSD512B1-15UI Field-Programmable Peripheral
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ZPSD512B1-20LM Field-Programmable Peripheral
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