diff --git a/lib/rtc_ds1307.c b/lib/rtc_ds1307.c
index 5575281..5724eb3 100644
--- a/lib/rtc_ds1307.c
+++ b/lib/rtc_ds1307.c
@@ -34,6 +34,8 @@
 #include "i2c_master.h" // i2c utilities
 
 #define RTC_DS1307_I2C_ADDR 0x68 /**< DS1307 I2C address (fixed to 0b1101000) */
+#define RTC_DS1307_EEPROM_ADDR 0x50 /**< AT24C32 EEPROM I2C address (0b1010xxx, xxx settable using pins), often also present on tiny RTC modules */
+#define RTC_DS1307_EEPROM_SIZE 4096 /**< EEPROM size in bytes (32kb/4096B for AT24C32, 32kb/8192B for AT24C64) */
 
 void rtc_ds1307_setup(void)
 {
@@ -186,7 +188,7 @@ uint8_t* rtc_ds1307_read_time(void)
 	return time;
 }
 
-bool rtc_ds1307_read_ram(uint8_t* data, uint8_t start, uint8_t length)
+bool rtc_ds1307_read_ram(uint8_t start, uint8_t* data, uint8_t length)
 {
 	// sanity checks
 	if (data==NULL || length==0) { // nothing to read
@@ -200,6 +202,20 @@ bool rtc_ds1307_read_ram(uint8_t* data, uint8_t start, uint8_t length)
 	return i2c_master_read(RTC_DS1307_I2C_ADDR, address, LENGTH(address), data, LENGTH(data)); // read RAM (starting at 0x08)
 }
 
+bool rtc_ds1307_read_rom(uint16_t start, uint8_t* data, uint16_t length)
+{
+	// sanity checks
+	if (data==NULL || length==0) { // nothing to read
+		return false;
+	}
+	if (start>RTC_DS1307_EEPROM_SIZE-1 || start+length>RTC_DS1307_EEPROM_SIZE) { // out of bounds ROM
+		return false;
+	}
+
+	const uint8_t address[] = {start>>8, start}; // memory address for data
+	return i2c_master_read(RTC_DS1307_EEPROM_ADDR, address, LENGTH(address), data, LENGTH(data)); // read ROM
+}
+
 bool rtc_ds1307_oscillator_disable(void)
 {
 	uint8_t data[1] = {0}; // to write CH value data over I2C
@@ -383,7 +399,7 @@ bool rtc_ds1307_write_time(uint8_t seconds, uint8_t minutes, uint8_t hours, uint
 	return i2c_master_write(RTC_DS1307_I2C_ADDR, address, LENGTH(address), data, LENGTH(data)); // write time value on RTC
 }
 
-bool rtc_ds1307_write_ram(uint8_t* data, uint8_t start, uint8_t length)
+bool rtc_ds1307_write_ram(uint8_t start, uint8_t* data, uint8_t length)
 {
 	// sanity checks
 	if (data==NULL || length==0) { // nothing to read
@@ -395,3 +411,19 @@ bool rtc_ds1307_write_ram(uint8_t* data, uint8_t start, uint8_t length)
 	const uint8_t address[] = {0x08+start}; // memory address for data
 	return i2c_master_write(RTC_DS1307_I2C_ADDR, address, LENGTH(address), data, LENGTH(data)); // write RAM (starting at 0x08)
 }
+
+bool rtc_ds1307_write_rom(uint16_t start, uint8_t* data, uint8_t length)
+{
+	// sanity checks
+	if (data==NULL || length==0) { // nothing to read
+		return false;
+	}
+	if (start>RTC_DS1307_EEPROM_SIZE-1 || start+length>RTC_DS1307_EEPROM_SIZE) { // out of bounds ROM
+		return false;
+	}
+	if (length>32) { // can't write more than 32 bytes pages
+		return false;
+	}
+	const uint8_t address[] = {start>>8, start}; // memory address for data
+	return i2c_master_write(RTC_DS1307_EEPROM_ADDR, address, LENGTH(address), data, LENGTH(data)); // write ROM
+}
diff --git a/lib/rtc_ds1307.h b/lib/rtc_ds1307.h
index 112a13f..2dce913 100644
--- a/lib/rtc_ds1307.h
+++ b/lib/rtc_ds1307.h
@@ -65,12 +65,20 @@ uint8_t rtc_ds1307_read_year(void);
  */
 uint8_t* rtc_ds1307_read_time(void);
 /** read user RAM from RTC IC
- *  @param[out] data array to store the RAM read
  *  @param[in] start start of the user RAM to read (0-55)
+ *  @param[out] data array to store the RAM read
  *  @param[in] length number of user RAM bytes to read (0-55)
  *  @return if read succeeded
  */
-bool rtc_ds1307_read_ram(uint8_t* data, uint8_t start, uint8_t length);
+bool rtc_ds1307_read_ram(uint8_t start, uint8_t* data, uint8_t length);
+/** read ROM from AT24Cxx EEPROM
+ *  @note only applies if an AT24Cxx EEPROM is also on the I2C bus, such as on the tiny RTC module
+ *  @param[in] start start address of the ROM to read (maximum depends on the EEPROM)
+ *  @param[out] data array to store the ROM read
+ *  @param[in] length number of bytes to read (maximum depends on the EEPROM)
+ *  @return if read succeeded
+ */
+bool rtc_ds1307_read_rom(uint16_t start, uint8_t* data, uint16_t length);
 /** disable RTC IC oscillator
  *  @return if disabling oscillator succeeded
  */
@@ -130,11 +138,18 @@ bool rtc_ds1307_write_year(uint8_t year);
  *  @return if write succeeded
  */
 bool rtc_ds1307_write_time(uint8_t seconds, uint8_t minutes, uint8_t hours, uint8_t day, uint8_t date, uint8_t month, uint8_t year);
-/** write user RAM from RTC IC
- *  @param[in] data array of byte to write in RAM
+/** write to user RAM on RTC IC
  *  @param[in] start start of the user RAM to write (0-55)
+ *  @param[in] data array of byte to write in RAM
  *  @param[in] length number of user RAM bytes to write (0-55)
  *  @return if write succeeded
  */
-bool rtc_ds1307_write_ram(uint8_t* data, uint8_t start, uint8_t length);
-
+bool rtc_ds1307_write_ram(uint8_t start, uint8_t* data, uint8_t length);
+/** write to ROM on AT24Cxx EEPROM
+ *  @note only applies if an AT24Cxx EEPROM is also on the I2C bus, such as on the tiny RTC module
+ *  @param[in] start start address of the ROM to write (maximum depends on the EEPROM)
+ *  @param[in] data array to write in ROM
+ *  @param[in] length number of bytes to write (maximum depends on the EEPROM)
+ *  @return if write succeeded
+ */
+bool rtc_ds1307_write_rom(uint16_t start, uint8_t* data, uint8_t length);