Datasheet

16.14.5. Input Capture Register 1 Low and High byte
The ICR1L and ICR1H register pair represents the 16-bit value, ICR1.The low byte [7:0] (suffix L) is
accessible at the original offset. The high byte [15:8] (suffix H) can be accessed at offset + 0x01. For
more details on reading and writing 16-bit registers, refer to Accessing 16-bit Registers.
Name: ICR1L and ICR1H
Offset: 0x86
Reset: 0x00
Property: -
Bit 15 14 13 12 11 10 9 8
ICR1[15:8]
Access
R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0 0 0
Bit 7 6 5 4 3 2 1 0
ICR1[7:0]
Access
R/W R/W R/W R/W R/W R/W R/W R/W
Reset 0 0 0 0 0 0 0 0
Bits 15:0 – ICR1[15:0]: Input Capture 1
The Input Capture is updated with the counter (TCNT1) value each time an event occurs on the ICP1 pin
(or optionally on the Analog Comparator output for Timer/Counter1). The Input Capture can be used for
defining the counter TOP value.
The Input Capture Register is 16-bit in size. To ensure that both the high and low bytes are read
simultaneously when the CPU accesses these registers, the access is performed using an 8-bit
temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit registers.
Refer to Accessing 16-bit Registers for details.
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
Atmel-8209F-ATmega16M1/32M1/64M1_Datasheet_Complete-10/2016
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