參數(shù)資料
型號(hào): ST78C34IP40
廠商: EXAR CORP
元件分類: Parallel IO Port
英文描述: 8 I/O, PIA-PRINTER INTERFACE, PDIP40
封裝: 0.600 INCH, PLASTIC, DIP-40
文件頁(yè)數(shù): 3/23頁(yè)
文件大?。?/td> 208K
代理商: ST78C34IP40
6-11
ST78C34
Rev. 3.00
Bit-5
Bit-4
INT output
STR
bit-0
bit-6
0
Normal mode
1
-ACK
0
1
FIFO empty
1
FIFO empty
1
0
FIFO full
1
FIFO full
1
FIFO empty
0
FIFO empty
AFR BIT-6:
INT output polarity.
0= Normal. INT output follows the -ACK input
1= Inverted INT output
AFR BIT-7:
FIFO enable / disable function.
0= FIFO is disabled( default mode).
1= FIFO is enabled. Internal 83 byte of FIFO is
enabled.
FIFO BYTE COUNT REGISTER (FBCR)
State and content of the printer FIFO can be moni-
tored by reading this register.
FCBR BIT 0-6:
FIFO byte count. Number of characters left in FIFO.
FCRB bit-0 is the LSB bit of the counter and FCRB bit-
6 is the MSB bit of the counter.
FBCR BIT-7:
FIFO state.
0= FIFO is enabled
1= FIFO is disabled
ST78C34 EXTERNAL RESET CONDITION
SIGNALS
RESET STATE
PD0-PD7
Unknown, output mode
-STROBE
High
-AUTOFDXT
High
INIT
Low
-SLCTIN
High
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