參數資料
型號: PSD4256G6V-10UIT
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 1M X 8 FLASH, 52 I/O, PIA-GENERAL PURPOSE, PQFP80
封裝: PLASTIC, TQFP-80
文件頁數: 114/127頁
文件大?。?/td> 1091K
代理商: PSD4256G6V-10UIT
PSD4256G6V
I/O ports
19.18
Output macrocells (OMC)
The CPLD output macrocells (OMC) occupy a location in the MCU’s address space. The
MCU can read the output of the output macrocells (OMC). If the Mask Macrocell register bits
are not set, writing to the macrocell loads data to the macrocell flip-flops. See Section 19:
19.19
Mask Macrocell register
Each Mask Macrocell register bit corresponds to an output macrocell (OMC) flip-flop. When
the Mask Macrocell register bit is set to a 1, loading data into the output macrocell (OMC)
flip-flop is blocked. The default value is 0, or unblocked.
19.20
Input macrocells (IMC)
The input macrocells (IMC) can be used to latch or store external inputs. The outputs of the
input macrocells (IMC) are routed to the PLD input bus, and can be read by the MCU. See
19.21
Enable Out
The Enable Out register can be read by the MCU. It contains the output enable values for a
given port. A 1 indicates the driver is in output mode. A 0 indicates the driver is in tri-state
and the pin is in input mode.
Table 49.
Port data registers
Register name
Port
MCU access
Data In
A, B, C, D, E, F,
G
READ – input on pin
Data Out
A, B, C, D, E, F,
G
WRITE/READ
Output macrocell
A, B
READ – outputs of macrocells
WRITE – loading macrocells flip-flop
Mask macrocell
A, B
WRITE/READ – prevents loading into a given
Macrocell
Input macrocell
A, B, C
READ – outputs of the input macrocells
Enable Out
A, B, C, F
READ – the output enable control of the port driver
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