ATmega16 datasheet(275/315 Pages) ATMEL

Part #	ATMEGA16

Description	8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash

PDF	315 Pages

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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275 / 315 page

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ATmega16(L)

2466E–AVR–10/02

Programming Enable Register

The Programming Enable Register is a 16-bit register. The contents of this register is

compared to the programming enable signature, binary code 1010_0011_0111_0000.

When the contents of the register is equal to the programming enable signature, pro-

gramming via the JTAG port is enabled. The register is reset to 0 on Power-on Reset,

and should always be reset when leaving Programming mode.

Figure 139. Programming Enable Register

Programming Command

The Programming Command Register is a 15-bit register. This register is used to seri-

ally shift in programming commands, and to serially shift out the result of the previous

command, if any. The JTAG Programming Instruction Set is shown in Table 116. The

state sequence when shifting in the programming commands is illustrated in Figure 141.

TDI

TDO

ClockDR & PROG_ENABLE

Programming Enable

$A370

ATMEGA16 Datasheet(PDF) 275 Page - ATMEL Corporation