ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

ATmega64 Boundary-

scan Order

Table 107 shows the Scan order between TDI and TDO when the Boundary-scan Chain

is selected as data path. Bit 0 is the LSB; the first bit scanned in, and the first bit

scanned out. The scan order follows the pinout order as far as possible. Therefore, the

bits of Port A are scanned in the opposite bit order of the other ports. Exceptions from

the rules are the scan chains for the analog circuits, which constitute the most significant

bits of the scan chain regardless of which physical pin they are connected to. In Figure

127, PXn, Data corresponds to FF0, PXn. Control corresponds to FF1, and PXn.

Pullup_enable corresponds to FF2. Bit 2, 3, 4, and 5 of Port C is not in the scan chain,

since these pins constitute the TAP pins when the JTAG is enabled.

Table 107. ATmega64 Boundary-scan Order

Bit Number Signal Name

Module

204

AC_IDLE

Comparator

203

ACO

202

ACME

201

AINBG

200

COMP

ADC

199

PRIVATE_SIGNAL1(1)

198

ACLK

197

ACTEN

196

PRIVATE_SIGNAL2(2)

195

ADCBGEN

194

ADCEN

193

AMPEN

192

DAC_9

191

DAC_8

190

DAC_7

189

DAC_6

188

DAC_5

187

DAC_4

186

DAC_3

185

DAC_2

184

DAC_1

183

DAC_0

182

EXTCH

181

G10

180

G20

179

GNDEN

178

HOLD

177

IREFEN

176

MUXEN_7

270 ATmega64(L)

2490G–AVR–03/04

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