ATMEGA164P-20MU Atmel, ATMEGA164P-20MU Datasheet - Page 14

• Manufacturer Part Number: ATMEGA164P-20MU
• Description: IC MCU AVR 16K FLASH 44-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA164P-20MU

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-VQFN Exposed Pad
• Processor Series: ATMEGA16x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: 2-Wire/JTAG/SPI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Package: 44MLF
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.5.1
4.5.2
4.6
8011O–AVR–07/10
Instruction Execution Timing
SPH and SPL – Stack Pointer High and Stack pointer Low
RAMPZ – Extended Z-pointer Register for ELPM/SPM
Note:
Table 4-2.
For ELPM/SPM instructions, the Z-pointer is a concatenation of RAMPZ, ZH, and ZL, as shown
in Figure 4-4. Note that LPM is not affected by the RAMPZ setting.
Figure 4-4.
The actual number of bits is implementation dependent. Unused bits in an implementation will
always read as zero. For compatibility with future devices, be sure to write these bits to zero.
This section describes the general access timing concepts for instruction execution. The AVR
CPU is driven by the CPU clock clk
chip. No internal clock division is used.
Figure 4-5 on page 15
by the Harvard architecture and the fast-access Register File concept. This is the basic pipelin-
ing concept to obtain up to 1 MIPS per MHz with the corresponding unique results for functions
per cost, functions per clocks, and functions per power-unit.
Bit
0x3E (0x5E)
0x3D (0x5D)
Read/Write
Initial Value
Bit
0x3B (0x5B)
Read/Write
Initial Value
Bit (Individually)
Bit (Z-pointer)
1. Initial values respectively for the ATmega164P/324P/644P.
Stack Pointer size
The Z-pointer used by ELPM and SPM
RAMPZ7
R/W
R/W
SP7
15
7
0
R
–
7
0
1
ATmega164P
ATmega324P
ATmega644P
23
7
Device
shows the parallel instruction fetches and instruction executions enabled
RAMPZ6
R/W
SP6
R/W
RAMPZ
14
6
0
R
–
6
0
1
RAMPZ5
R/W
SP5
R/W
CPU
5
0
13
R
–
5
0
1
16
0
, directly generated from the selected clock source for the
RAMPZ4
0/0/1
R/W
SP12
SP4
R/W
R/W
4
0
12
4
1
(1)
15
7
ATmega164P/324P/644P
RAMPZ3
R/W
0/1/0
SP11
SP3
R/W
R/W
3
0
11
3
1
(1)
ZH
RAMPZ2
R/W
1/0/0
SP10
2
0
SP2
R/W
R/W
10
Stack Pointer size
2
1
(1)
0
8
SP[10:0]
SP[11:0]
SP[12:0]
RAMPZ1
R/W
SP9
SP1
R/W
R/W
1
0
9
1
0
1
7
7
RAMPZ0
R/W
SP8
SP0
R/W
R/W
0
0
8
0
0
1
ZL
RAMPZ
SPH
SPL
0
0
14