参数资料
| 型号： | ST78C34CP40-F |
| 厂商： | Exar Corporation |
| 文件页数： | 21/21页 |
| 文件大小： | 0K |
| 描述： | IC UART FIFO 83B 40PDIP |
| 标准包装： | 9 |
| 特点： | * |
| FIFO's： | 83 字节 |
| 规程： | 打印机 |
| 电源电压： | 5V |
| 带并行端口： | 是 |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-PDIP |
| 包装： | 管件 |
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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