ATMEGA162-16AC Atmel, ATMEGA162-16AC Datasheet - Page 24

• Manufacturer Part Number: ATMEGA162-16AC
• Description: IC MCU AVR 16K 5V 16MHZ 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA162-16AC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• 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): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

External Memory
Interface
Overview
Using the External Memory
Interface
24
ATmega162(V/U/L)
With all the features the External Memory Interface provides, it is well suited to operate
as an interface to memory devices such as external SRAM and FLASH, and peripherals
such as LCD-display, A/D, and D/A. The main features are:
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When the eXternal MEMory (XMEM) is enabled, address space outside the internal
SRAM becomes available using the dedicated external memory pins (see Figure 1 on
page 2, Table 29 on page 68, Table 35 on page 73, and Table 41 on page 79). The
memory configuration is shown in Figure 11.
Figure 11. External Memory with Sector Select
Note:
The interface consists of:
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•
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Four Different Wait-state Settings (Including No Wait-state)
Independent Wait-state Setting for Different External Memory Sectors (Configurable
Sector Size)
The Number of Bits Dedicated to Address High Byte is Selectable
Bus Keepers on Data Lines to Minimize Current Consumption (Optional)
AD7:0: Multiplexed low-order address bus and data bus
A15:8: High-order address bus (configurable number of bits)
ALE: Address latch enable
RD: Read strobe.
WR: Write strobe.
1. Address depends on the ATmega161 compability Fuse. See “SRAM Data Memory”
on page 16 and Figure 9 on page 17 for details.
External Memory
(0-64K x 8)
Internal Memory
Lower Sector
Upper Sector
SRW01
SRW00
SRW11
SRW10
0x0000
0x04FF/0x045F
0x0500/0x0460
0xFFFF
SRL[2..0]
(1)
(1)
2513C–AVR–09/02