Toshiba H1 Series Data Book page 155

3.7.15 Port M (PM1, PM2, PM7)
PM1, PM2 and PM7 are 3-bit output ports. Resetting sets the output latch PM to "1", and
PM1, PM2 and PM7 pins output "1". In addition to functioning as output ports, Port M also
function as output pin for timers (TA1OUT), output pins for RTC alarm ( ALARM ), output
pin for melody/alarm generator (MLDALM, MLDALM ) and Power control pin (PWE).
Above setting is used the function register PMFC.
PM1 has two output function which MLDALM and TA1OUT, and PM2 has two output
function which
Reset
PM Reset
TA1OUT
MLDALM
and MLDALM . This selection is used PM<PM1>, PM<PM2>.
ALARM
Function control
PMFC write
S
Output latch
A
Selector
B
PM write
A S
Y
Selector
B
Figure 3.7.38 Port M1
92CZ26A-152
S
Y
TMP92CZ26A
PM1
(MLDALM,
TA1OUT)