ATmega328P datasheet(143/448 Pages) ATMEL

tên linh kiện	ATmega328P

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash

PDF	448 Pages

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nhà sản xuất	ATMEL [ATMEL Corporation]

Trang chủ	http://www.atmel.com

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143 / 448 page

143

8161D–AVR–10/09

ATmega48PA/88PA/168PA/328P

16.4

16.4.1

GTCCR – General Timer/Counter Control Register

• Bit 7 – TSM: Timer/Counter Synchronization Mode

Writing the TSM bit to one activates the Timer/Counter Synchronization mode. In this mode, the

value that is written to the PSRASY and PSRSYNC bits is kept, hence keeping the correspond-

ing prescaler reset signals asserted. This ensures that the corresponding Timer/Counters are

halted and can be configured to the same value without the risk of one of them advancing during

configuration. When the TSM bit is written to zero, the PSRASY and PSRSYNC bits are cleared

by hardware, and the Timer/Counters start counting simultaneously.

• Bit 0 – PSRSYNC: Prescaler Reset

When this bit is one, Timer/Counter1 and Timer/Counter0 prescaler will be Reset. This bit is nor-

mally cleared immediately by hardware, except if the TSM bit is set. Note that Timer/Counter1

and Timer/Counter0 share the same prescaler and a reset of this prescaler will affect both

timers.

Bit

76543

0x23 (0x43)

TSM

–

PSRASY

PSRSYNC

GTCCR

Read/Write

R/W

RRRR

R/W

Initial Value

00000

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