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ST16C452CJ68PS Folha de dados(PDF) 11 Page - Exar Corporation |
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ST16C452CJ68PS Folha de dados(HTML) 11 Page - Exar Corporation |
11 / 30 page 11 ST16C452/452PS Rev. 3.20 available at the user data interface, D0-D7. The user optionally compares the received data to the initial transmitted data for verifying error free operation of the UART TX/RX circuits. In this mode, the receiver and transmitter interrupts are fully operational. The Modem Control Interrupts are also operational. However, the interrupts can only be read using lower four bits of the Modem Control Register (MCR bits 0-3) instead of the four Modem Status Register bits 4-7. The interrupts are still controlled by the IER. Figure 6, INTERNAL LOOP-BACK MODE DIAGRAM D0-D7 -IOR -IOW -RESET BIDEN A0-A2 -CSA -CSB -CSP INT A,B INTP TX A,B RX A,B Transmit Holding Registers Transmit Shift Register Receive Holding Registers Receive Shift Register Clock & Baud Rate Generator Printer Data Ports PD0-PD7 Printer Control Logic -STROBE INIT -AUTOFDX -SELCTIN PE, SELECT -BUSY, -ACK ERROR -CTS -RTS -DTR -DSR -RI -CD (-OP1) (-OP2) |
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Descrição semelhante - ST16C452CJ68PS |
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