AT89LP4052-20XU Atmel, AT89LP4052-20XU Datasheet - Page 65

• Manufacturer Part Number: AT89LP4052-20XU
• Description: IC 8051 MCU FLASH 4K 20TSSOP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP4052-20XU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-TSSOP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: UART, SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 2.4 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: AT89ISP
• Minimum Operating Temperature: - 40 C
• Package: 20TSSOP
• Device Core: 8051
• Family Name: AT89
• Maximum Speed: 20 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

23.4.7
3547J–MICRO–10/09
Read Code Page
Function:
Usage:
Figure 23-11. Read Code Page Sequence
Note:
• Read 1 page (1 to 32 bytes) of data from the Code Memory array.
• Page address determined by bits [11:5] of loaded address.
• The byte address (offset in page) is initialized to bits [4:0] of the low address byte. The
• Read data will be output on P1 after the falling edge of fourth XTAL1 pulse (address low byte
1. Bring CS (P3.2) low.
2. Drive P1 to AAh and pulse XTAL1 high.
3. Drive P1 to 30h and pulse XTAL1 high.
4. Drive P1 with bits [15:8] of address and pulse XTAL1 high.
5. Drive P1 with bits [7:0] of address and bring XTAL1 high.
6. Tri-state P1.
7. Bring XTAL1 low.
8. Read data from P1.
9. To read additional data bytes in the page, pulse XTAL1 high to increment to the next
10. Drive CS high.
internal address is incremented by one on the negative edge of the XTAL1 pulse. The
address will wrap around to the 1st byte of the page when incremented past 31.
strobe). The programmer should tri-state P1 prior to this edge to avoid bus contention on P1.
XTAL1
address.
CS
P1
The waveform on this page is not to scale.
AAh
30h
0000aaaa aaabbbbb
AT89LP2052/LP4052
DOUT 0
DOUT 1
DOUTn
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