T89C5115-RATIM Atmel, T89C5115-RATIM Datasheet - Page 25

• Manufacturer Part Number: T89C5115-RATIM
• Description: IC 8051 MCU FLASH 16K 32VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C5115-RATIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C5115-RASIM; T89C5115-RASIM

Upper 128 Bytes RAM
Expanded RAM
4128G–8051–02/08
Figure 10. Lower 128 Bytes Internal RAM Organization
The upper 128 Bytes of RAM are accessible from address 80h to FFh using only indirect
addressing mode.
The on-chip 256 Bytes of expanded RAM (XRAM) are accessible from address 0000h to
00FFh using indirect addressing mode through MOVX instructions. In this address
range.
Note:
Lower 128 Bytes RAM, Upper 128 Bytes RAM, and expanded RAM are made of volatile
memory cells. This means that the RAM content is indeterminate after power-up and
must then be initialized properly.
30h
20h
18h
10h
08h
00h
7Fh
2Fh
1Fh
17h
0Fh
07h
bit-Addressable Space
(bit Addresses 0-7Fh)
4 Banks of
8 Registers
R0-R7
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