DS89C450-QNG+ Maxim Integrated Products, DS89C450-QNG+ Datasheet - Page 34

• Manufacturer Part Number: DS89C450-QNG+
• Description: IC MCU FLASH 64KB 25MHZ 44-PLCC
• Manufacturer: Maxim Integrated Products
• Series: 89Cr

Specifications of DS89C450-QNG+

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: EBI/EMI, SIO, UART/USART
• Peripherals: Power-Fail Reset, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-LCC, 44-PLCC
• Processor Series: DS89C450
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: UART
• Maximum Clock Frequency: 33 MHz
• Number Of Programmable I/os: 4
• Number Of Timers: 3
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: DS89C450-KIT#
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Figure 12. Page Mode 1, External Data Memory Access
(PAGES = 01, STRETCH = 1, CD = 10)
RD / WR
RD / WR
XTAL1
Port 0
Port 2
RD / WR
PSEN
PSEN
Port 0
Port 2
Port 0
Port 2
ALE
PSEN
ALE
ALE
LSB Addr
LSB Addr
LSB Addr
Inst
Inst
Inst
MOVX Inst
Fetch
MOVX Inst
Fetch
LSB Addr
LSB Addr
LSB Addr
MOVX
MOVX
Inst
MSB Addr
MSB Addr
LSB Addr
Inst
LSB Addr
LSB Addr
MSB Addr
Memory Access (Stretch =1)
MOVX
Inst
DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers
MOVX Instruction
MOVX Instruction
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Memory Access (Stretch =1)
LSB Addr
Inst
Memory Access (Stretch =1)
LSB Addr
LSB Addr
MOVX Instruction
Data
Data
LSB Addr
Data
LSB Addr
LSB Addr
Inst
Inst
LSB Addr
LSB Addr
LSB Addr
Inst
Inst
Inst
LSB Addr
LSB Addr
LSB Addr
Inst
Inst
Inst