diff --git a/esphome/components/pcf85063/pcf85063.h b/esphome/components/pcf85063/pcf85063.h
index 1a3fd70..cbe9e2a 100644
--- a/esphome/components/pcf85063/pcf85063.h
+++ b/esphome/components/pcf85063/pcf85063.h
@@ -7,6 +7,18 @@
 namespace esphome {
 namespace pcf85063 {
 
+enum PCF85063ATimerInterruptMode_t : bool {
+  TIMER_INTERRUPT_MODE_FLAG = 0,
+  TIMER_INTERRUPT_MODE_PULSE = 1,
+};
+
+enum PCF85063ATimerClockFrequency_t : uint8_t {
+  TIMER_CLOCK_4096HZ = 0,
+  TIMER_CLOCK_64HZ = 1,
+  TIMER_CLOCK_SECOND = 2,
+  TIMER_CLOCK_MINUTE = 3,
+};
+
 class PCF85063Component : public time::RealTimeClock, public i2c::I2CDevice {
  public:
   void setup() override;
@@ -68,7 +80,7 @@ class PCF85063Component : public time::RealTimeClock, public i2c::I2CDevice {
 
       // Weekdays register
       uint8_t weekday : 3;
-      uint8_t unused_3 : 5;
+      uint8_t : 5;
 
       // Months register
       uint8_t month : 4;
@@ -78,6 +90,44 @@ class PCF85063Component : public time::RealTimeClock, public i2c::I2CDevice {
       // Years register
       uint8_t year : 4;
       uint8_t year_10 : 4;
+
+      // PCF85063A Additional registers
+      // Second alarm
+      uint8_t alarm_second : 4;
+      uint8_t alarm_second_10 : 3;
+      bool alarm_second_enabled : 1;
+
+      // Minute alarm
+      uint8_t alarm_minute : 4;
+      uint8_t alarm_minute_10 : 3;
+      bool alarm_minute_enabled : 1;
+
+      // Hour alarm
+      uint8_t alarm_hour : 4;
+      uint8_t alarm_hour_10 : 2;
+      uint8_t : 1;
+      bool alarm_hour_enabled : 1;
+
+      // Day alarm
+      uint8_t alarm_day : 4;
+      uint8_t alarm_day_10 : 2;
+      uint8_t : 1;
+      bool alarm_day_enabled : 1;
+
+      // Weekday alarm
+      uint8_t alarm_weekday : 3;
+      uint8_t : 4;
+      bool alarm_weekday_enabled : 1;
+
+      // Timer value
+      uint8_t timer_value : 8;
+
+      // Timer mode
+      PCF85063ATimerInterruptMode_t timer_interrupt_mode : 1;
+      bool timer_interrupt_enable : 1;
+      bool timer_enable : 1;
+      PCF85063ATimerClockFrequency_t timer_clock_frequency : 2;
+      uint8_t : 3;
     } reg;
     mutable uint8_t raw[sizeof(reg)];
   } pcf85063_;