TS80C54_14 datasheet(9/62 Pages) ATMEL

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TS80C54 Scheda tecnica(PDF) 9 Page - ATMEL Corporation

Il numero della parte	TS80C54

Spiegazioni elettronici	Programmable Clock Out and Up/Down Timer/Counter 2

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Produttore elettronici	ATMEL [ATMEL Corporation]

Homepage	http://www.atmel.com

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9 / 62 page

4431E–8051–04/06

AT/TS8xC54/8X2

Figure 6-2.

Mode Switching Waveforms

The X2 bit in the CKCON register (See Table 6-1.) allows to switch from 12 clock cycles per

instruction to 6 clock cycles and vice versa. At reset, the standard speed is activated (STD

mode). Setting this bit activates the X2 feature (X2 mode).

CAUTION

In order to prevent any incorrect operation while operating in X2 mode, user must be aware that

all peripherals using clock frequency as time reference (UART, timers) will have their time refer-

ence divided by two. For example a free running timer generating an interrupt every 20 ms will

then generate an interrupt every 10 ms. UART with 4800 baud rate will have 9600 baud rate.

XTAL1:2

XTAL1

CPU clock

X2 bit

X2 Mode

STD Mode

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
ATMEL Corporation	TS80C54X2	1Mb / 58P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
TEMIC Semiconductors	TS80C54X2	288Kb / 58P	8-bit CMOS Microcontroller 0-60 MHz
ATMEL Corporation	TS80C54X2XXX-LCA	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
	TS80C54X2XXX-LCB	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP
	TS80C54X2XXX-LCC	527Kb / 62P	8-bit CMOS Microcontroller 16/32 Kbytes ROM/OTP

Produttore elettronici	Il numero della parte	Scheda tecnica	Spiegazioni elettronici
ATMEL Corporation	AT87C51RB2	996Kb / 86P	Programmable Clock Out and Up/Down Timer/Counter 2
	TS80C51RA2	996Kb / 86P	Programmable Clock Out and Up/Down Timer/Counter 2
	TS87C54	527Kb / 62P	Programmable Clock Out and Up/Down Timer/Counter 2
	TS87C58X2	527Kb / 62P	Programmable Clock Out and Up/Down Timer/Counter 2
	AT83C51RD2	996Kb / 86P	Programmable Clock Out and Up/Down Timer/Counter 2
	TS80C58X2	527Kb / 62P	Programmable Clock Out and Up/Down Timer/Counter 2
	T83C5101	679Kb / 58P	Programmable Clock Out and Up/Down Timer/Counter 2
	AT87C51RC2	996Kb / 86P	Programmable Clock Out and Up/Down Timer/Counter 2
Exar Corporation	XR-2240	215Kb / 3P	PROGRAMMABLE TIMER / COUNTER
National Semiconductor ...	LM2240	190Kb / 10P	Programmable Timer/Counter

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