Merge pull request #25 from nosferatujr/patch-1

Update adafruit_pcf8523.py

Author: kattni

adafruit_pcf8523.py

@@ -113,6 +113,19 @@ class PCF8523:
     datetime_register = i2c_bcd_datetime.BCDDateTimeRegister(0x03, False, 0)
     """Current date and time."""
 
+    clockout_frequency = i2c_bits.RWBits(3, 0x0F, 3)
+    """Clock output frequencies generated. Default is 32.768kHz.
+    Possible values are as shown (selection value - frequency).
+    000 - 32.768khz
+    001 - 16.384khz
+    010 - 8.192kHz
+    011 - 4.096kHz
+    100 - 1.024kHz
+    101 - 0.032kHz (32Hz)
+    110 - 0.001kHz (1Hz)
+    111 - Disabled
+    """
+
     # The False means that day and weekday share a register. The 0 is that the
     # first day of the week is value 0 and not 1.
     alarm = i2c_bcd_alarm.BCDAlarmTimeRegister(