The ST16C552/ST16C552A (552/552A) is a dual universal asynchronous receiver and transmitter (UART) with an added bi-directional parallel port that is directly compatible with a CENTRONICS type printer. The parallel port is designed such that the user can configure it as general purpose I/O interface, or for connection to other printer devices.
The 552/552A provides enhanced UART functions with 16 byte FIFO’s, a modem control interface, and data rates up to 1.5Mbps. Onboard status registers provide the user with error indications and operational status. The system interrupts and control may be tailored to meet user requirements. An internal loop-back capability allows onboard diagnostics. A programmable baud rate generator is provided to select transmit and receive clock rates from 50 bps to 1.5 Mbps.
The 552/552A is available in a 68 pin PLCC package. The 552/552A is compatible with the 16C450 and 16C550. The difference between the ST16C552 and ST16C552A is the logic state of the printer port, INTP interrupt. The INTP interrupt is active high (logic 1) on the ST16C552 whereas INTP is active low (logic 0) on the ST16C552A part when the interrupt latch mode is selected. The 552/552A is fabricated in an advanced CMOS process with power down mode to reduce the power consumption. The 552A does not support the power down mode.
Pin to pin and functional compatible to ST16C452/452PS, TL16C552
Software compatible with INS8250, NS16C550
1.5 Mbps transmit/receive operation (24MHz)
16 byte transmit FIFO
16 byte receive FIFO with error flags
Independent transmit and receive control
Modem and printer status registers
UART port and printer port Bi-directional
Printer port direction set by single control bit or 8 bit pattern (AA/55)
Modem control signals (-CTS, -RTS, -DSR, -DTR, -RI, -CD)
Programmable character lengths (5, 6, 7, 8)
Even, odd, or no parity bit generation and detection
Internal loop-back diagnostics
TTL compatible inputs, outputs
Power down mode
Pb-Free, RoHS Compliant Versions Offered
帐号：0118 0104 0002 949
注 意：通过网上银行直接转账的客户，请在收款方汇款账户前加“19”，即汇款账号为19 0118 0104 0002 949