參數(shù)資料
型號： PSD713S5
英文描述： Field Programmable Microcontroller Peripherals with Supervisory Functions(可編程邏輯，4K位SRAM,27個(gè)可編程I/O,通用PLD有66個(gè)輸入)
中文描述： 現(xiàn)場可編程微控制器外圍設(shè)備具有監(jiān)督職能（可編程邏輯，4K的位的SRAM，27余個(gè)可編程輸入/輸出，通用PLD的有66個(gè)輸入）
文件頁數(shù)： 43/104頁
文件大?。?/td> 515K
代理商： PSD713S5
PSD7XX Family
13-43
Port Operating Modes
The I/O Ports have several modes of operation as shown in Table 22. The mode may be
selected using the PSDabel tool and programmed into the device using Non-Volatile
Memory (NVM) that is active when power is applied and cannot be altered unless the
device is reprogrammed. If a mode is not defined in PSDsoft, then other modes can be
set by the microcontroller writing to the Port configuration registers. The PLD I/O, Data Port
Address Input and Supervisory Function modes are NVM configurations. The other modes
are initiated by the microcontroller.
If the NVM modes are not selected, the port can be altered dynamically between MCU I/O
or Address Out modes by writing to the Control Register. Each bit of the eight-bit Control
Register may store a “1”, setting its respective bit in the port to MCU I/O, or to a “0”, setting
it to Address Out. The Direction Register or the output enable product term determine if the
pin is input or output.
Table 22 summarizes the operating modes of the I/O ports. Not all the functions are
available to every port. Table 23 shows how and where the different modes are configured.
Port Mode
Port A
Port B
Port C
Port D
MCU I/O
Yes
Yes
Yes
Yes
PLD I/O
McellAB Outputs
McellC Outputs
ECSPLD Outputs
PLD Inputs
PA7–4
No
PA3–0
Yes
PB7–4
No
PB3–0
Yes
No
PC7–0
No
Yes
No
No
PD2–0
Yes
Address Out
Yes (A7–0)
Yes (A7–0,
A15–8)
No
No
Address In
Yes
Yes
Yes
No
Data Port
Yes (D7–0)
Yes (D15–8)
No
No
Open Drain
Yes (PA7–4)
Yes (PB7–4)
Yes
No
Slew Rate
Yes (PA3–0)
Yes (PB3–0)
No
Yes
Peripheral I/O
Yes
No
No
No
Supervisory Function
No
No
Yes
No
Table 22. Port Operating Modes
I/O Ports
(cont.)
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