ATMEGA164PA-MCH Atmel, ATMEGA164PA-MCH Datasheet - Page 268
![MCU AVR 16KB FLASH 20MHZ 44-VQFN](/photos/12/13/121316/313-44-qfn_sml.jpg)
ATMEGA164PA-MCH
Manufacturer Part Number
ATMEGA164PA-MCH
Description
MCU AVR 16KB FLASH 20MHZ 44-VQFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA164PA-MCH
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-VQFN Exposed Pad
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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24.3
24.3.1
24.3.2
Version
Part Number
Manufacturer ID
24.3.3
8272A–AVR–01/10
Data Registers
Bypass Register
Device Identification Register
Reset Register
The Data Registers relevant for Boundary-scan operations are:
• Bypass Register
• Device Identification Register
• Reset Register
• Boundary-scan Chain
The Bypass Register consists of a single Shift Register stage. When the Bypass Register is
selected as path between TDI and TDO, the register is reset to 0 when leaving the Capture-DR
controller state. The Bypass Register can be used to shorten the scan chain on a system when
the other devices are to be tested.
Figure 24-1
Figure 24-1. The Format of the Device Identification Register
Version is a 4-bit number identifying the revision of the component. The JTAG version number
follows the revision of the device. Revision A is 0x0, revision B is 0x1 and so on.
The part number is a 16-bit code identifying the component. The JTAG Part Number for
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P is listed in
298.
The Manufacturer ID is a 11-bit code identifying the manufacturer. The JTAG manufacturer ID
for ATMEL is listed in
The Reset Register is a test Data Register used to reset the part. Since the AVR tri-states Port
Pins when reset, the Reset Register can also replace the function of the unimplemented optional
JTAG instruction HIGHZ.
A high value in the Reset Register corresponds to pulling the external Reset low. The part is
reset as long as there is a high value present in the Reset Register. Depending on the fuse set-
tings for the clock options, the part will remain reset for a reset time-out period (refer to
Sources” on page
not latched, so the reset will take place immediately, as shown in
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Bit
Device ID
shows the structure of the Device Identification Register.
MSB
31
Version
4 bits
31) after releasing the Reset Register. The output from this Data Register is
Table 26-6 on page
28
27
Part Number
16 bits
298.
12
11
Figure
Manufacturer ID
11 bits
24-2.
Table 26-6 on page
1
LSB
1-bit
”Clock
1
0
268
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