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TS5070FNTR 데이터시트(PDF) 6 Page - STMicroelectronics |
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TS5070FNTR 데이터시트(HTML) 6 Page - STMicroelectronics |
6 / 32 page FUNCTIONAL DESCRIPTION POWER-ON INITIALIZATION When power is first applied, power-on reset cir- cuitry initializes COMBO IIG and puts it into the power-down state. The gain control registers for the transmit and receive gain sections are pro- grammed for no output, the hybrid balance circuit is turned off, the power amp is disabled and the device is in the non-delayed timing mode. The Latch Direction Register (LDR) is pre-set with all IL pins programmed as inputs, placing the SLIC interface pins in a high impedance state. The CI/O pin is set as an input ready for the first con- trol byte of the initialization sequence. Other initial states in the Control Register are indicated in Ta- ble 2. A reset to these same initial conditions may also be forced by driving the MR pin momentarilyhigh. This may be done either when powered-up or down. For normal operation this pin must be pulled low. If not used, MR should be hard-wired to ground. The desired modes for all programmable functions may be initialized via the control port prior to a Power-up command. INTERFACE, CONTROL, RESET Name Pin Type TS5070 FN TS5071 N Function Description IL5 IL4 IL3 IL2 IL1 IL0 I/O I/O I/O I/O I/O I/O 23 24 6 7 25 26 – 16 4 5 17 18 Interface Latches IL5 through IL0 are available on the TS5070, IL4 through IL0 are available on the TS5071. Each interface Latch I/O pin may be individually programmed as an input or an output determined by the state of the corresponding bit in the Latch Direction Register (LDR) . For pins configured as inputs, the logic state sensed on each input is latched into the interface Latch Register (ILR) whenever control data is written to COMBO IIG, while CS is low, and the information is shifted out on the CO (or CI/O) pin. When configured as outputs, control data written into the ILR appears at the corresponding IL pins. CCLK I 13 9 Control Clock This clock shifts serial control information into or out of CI or CO (or CI/O) when the CS input is low depending on the current instruction. CCLK may be asynchronous with the other system clocks. CI/O I/O – 8 Control Data Input/output This is Control Data I/O pin wich is provided on the TS5071. Serial control information is shifted into or out of COMBO IIG on this pin when CS is low. The direction of the data is determined by the current instruction as defined in Table 1. CI CO I O 12 11 – – Control Data Input Control Data Output These are separate controls, availables only on the TS5070. They can be wired together if required. CS I 14 10 Chip Select When this pins is low, control information can be written to or read from the COMBO IIG via the CI and CO pins (or CI/O). MR I 15 11 Master Reset This logic input must be pulled low for normal operation of COMBO IIG. When pulled momentarily high, all programmable registers in the device are reset to the states specified under ”Power–on Initialization”. TS5070 - TS5071 6/32 |
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