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PCF85263ATL/A 数据表(PDF) 49 Page - NXP Semiconductors |
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PCF85263ATL/A 数据表(HTML) 49 Page - NXP Semiconductors |
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49 / 102 page  NXP Semiconductors PCF85263A Tiny RTC/Calendar with Alarm Function, Battery Switch-Over, Time Stamp Input, and I2C-bus Setting the CLKPM bit disables the CLK output and forces the pin to drive out a logic 0. Clearing this bit enables the pad to output the selected clock frequency. To see bits COF[2:0] in the function register, see Table 50. 7.12.2 TSPULL: TS pin pullup resistor value Bit Symbol Value Description TS pin pullup resistor value 0 [1] 80 kΩ 6 TSPULL 1 40 kΩ Table 44. TSPULL bit - Pin_IO control register (address 27h) [1] Default value. Controls the pullup resistor value used in the mechanical switch detector. For applications where there is a large capacitance on the TS pin, for example, from a long connecting cable to the mechanical switch, the pullup resistor value can be halved to improve switch detection. Using the low-resistance value increases current consumption when the switch is closed, i.e., shorting to VSS. 7.12.3 TSL: TS pin level sense Bit Symbol Value Description TS pin input sense 0 [1] Active HIGH 5 TSL 1 Active LOW Table 45. TSL bit - Pin_IO control register (address 27h) [1] Default value. The active state of the TS pin can be defined for use as a timestamp trigger and/or as stop control for the time counting. Active HIGH implies a transition from logic 0 to logic 1 is active. Active LOW implies a transition from logic 1 to logic 0 is active. 7.12.4 TSPM[1:0]: TS pin I/O control Bit Symbol Value Description TS pin IO mode 00 [1] Disabled; input can be left floating 01 INTB output; push-pull 10 CLK output; push-pull 3 to 2 TSPM[1:0] 11 Input mode Table 46. TSPM[1:0] bits - Pin_IO control register (address 27h) [1] Default value. These bits control the operation of the TS pin. PCF85263A All information provided in this document is subject to legal disclaimers. © 2025 NXP B.V. All rights reserved. Product data sheet Rev. 5.4 — 12 December 2025 Document feedback 49 / 102 |
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