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ST16C1450CJ28 Arkusz danych(PDF) 4 Page - Exar Corporation |
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ST16C1450CJ28 Arkusz danych(HTML) 4 Page - Exar Corporation |
4 / 28 page ST16C1450 xr 2.97V TO 5.5V UART REV. 4.2.1 4 Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain. 1.0 PRODUCT DESCRIPTION The ST16C1450 provides serial asynchronous receive data synchronization, parallel-to-serial and serial-to- parallel data conversions for both the transmitter and receiver sections. These functions are necessary for converting the serial data stream into parallel data that is required in digital data systems. Synchronization for the serial data stream is accomplished by adding start and stops bits to the transmit data to form a data character (character orientated protocol). Data integrity is ensured by attaching a parity bit to the data character. The parity bit is checked by the receiver for any transmission bit errors. The 1450 is capable of operation up to 1.5 Mbps with a 24 MHz crystal or external clock input with a 16X sampling clock (at VCC = 5.0V). With a crystal of 14.7456 MHz and through a software option, the user can select data rates up to 921.6 Kbps. DSR# 26 39 I Data Set Ready input or general purpose input (active low). If this pin is not needed for modem communication, then it can be used as a general I/O. If it is not used, connect it to VCC. CD# 27 40 I Carrier Detect input or general purpose input (active low). If this pin is not needed for modem communication, then it can be used as a general I/O. If it is not used, connect it to VCC. RI# 17 21 I Ring Indicator input or general purpose input (active low). If this pin is not needed for modem communication, then it can be used as a general I/O. If it is not used, connect it to VCC. ANCILLARY SIGNALS XTAL1 12 15 I Crystal or external clock input. See Figure 3 for typical oscillator connections. XTAL2 13 16 O Crystal or buffered clock output. See Figure 3 for typical oscillator connections. RESET 24 33 I Reset Input (active high). When it is asserted, the UART configuration registers are reset to default values, see Table 6. RST - 22 O Reset Output (active high). This output is only available on the ST16C1451. When IER bit-5 is a logic 0, RST will follow the logical state of the RESET pin. When IER bit- 5 is a logic 1, the user may send software (soft) resets via MCR bit-2. Soft resets from MCR bit-2 are “ORed” with the state of the RESET pin. VCC 28 41 Pwr Power supply input of 2.97 to 5.5V. GND 15 19 Pwr Power supply common ground. N.C. - 1, 2, 10-14, 18, 24-26, 29, 35-38, 42, 44, 48 - Not connected. NAME 28-PIN PLCC 48-PIN TQFP TYPE DESCRIPTION |
Podobny numer części - ST16C1450CJ28 |
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Podobny opis - ST16C1450CJ28 |
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