71M6543F datasheet(74/157 Pages) MAXIM

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71M6543F/H and 71M6543G/GH Data Sheet

v1.2

Table 61: TMUX2[4:0] Selections

TMUX2[4:0]

Signal Name

Description

WD_OVF

Indicates when the watchdog timer has expired (overflowed).

PULSE_1S

One second pulse with 25% Duty Cycle. This signal can be used

to measure the deviation of the RTC from an ideal 1 second

interval. Multiple cycles should be averaged together to filter out

jitter.

PULSE_4S

Four second pulse with 25% Duty Cycle. This signal can be used

to measure the deviation of the RTC from an ideal 4 second

interval. Multiple cycles should be averaged together to filter out

jitter. The 4 second pulse provides a more precise measurement

than the 1 second pulse.

RTCLK

32.768 kHz clock waveform

SPARE[1] bit – I/O RAM

0x2704[1]

Copies the value of the bit stored in 0x2704[1]. For general

purpose use.

SPARE[2] bit – I/O RAM

0x2704[2]

Copies the value of the bit stored in 0x2704[2]. For general

purpose use.

WAKE

Indicates when a WAKE event has occurred.

MUX_SYNC

Internal multiplexer frame SYNC signal. See Figure 4 and Figure

MCK

See 2.5.3 on page 50.

GNDD

Digital GND. Use this signal to make the TMUX2OUT pin static.

INT0 – DIG I/O

Interrupt 0. See 2.4.9 on page 40. Also see Figure 12 on page 46.

INT1 – DIG I/O

INT2 – CE_PULSE

INT3 – CE_BUSY

INT4 - VSTAT

INT5 – EEPROM/SPI

INT6 – XFER, RTC

RTM_CK (flash)

See 2.3.5 on page 26.

Note:

All

TMUX2[4:0] values which are not shown are reserved.

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