XE8802MI035LF Semtech, XE8802MI035LF Datasheet - Page 18

• Manufacturer Part Number: XE8802MI035LF
• Description: IC DAS 16BIT FLASH 8K 100-LQFP
• Manufacturer: Semtech

Specifications of XE8802MI035LF

• Applications: Sensing Machine
• Core Processor: RISC
• Program Memory Type: FLASH (22 kB)
• Controller Series: XE8000
• Ram Size: 1K x 8
• Interface: SPI, UART
• Number Of I /o: 36
• Voltage - Supply: 2.4 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• For Use With: XE8000MP - PROG BOARD AND PROSTART2 CARD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.4 Operating speed
2.4.1
The speed of the flash devices is not highly dependent upon the supply voltage. However, by limiting the
temperature range, the speed can be increased. The minimal guaranteed speed as a function of the supply voltage
and maximal temperature operating temperature is given in Figure2-2.
Figure 2-1. Supply configuration for flash circuit operation.
Figure 2-2. Guaranteed speed as a function of the supply voltage and maximal temperature.
The maximal speed of the device depends on the setting of the NFASTREAD pin. If NFASTREAD=1, the full 8k
instructions of the memory are available and the speed is limited to 2-3MIPS. If NFASTREAD=0, only 4k
instructions are available but the speed is doubled.
Important Note
The circuit has to be programmed for the correct option of the NFASTREAD pin. If not, the execution of the
software may not be correct.
© Semtech 2006
7
6
5
4
3
2
1
0
2
Flash circuit version
NFASTREAD=1 85°C
NFASTREAD=0 85°C
3
supply voltage VBAT (V)
VBAT
VREG
XE8802 Sensing Machine Data Acquisition MCU
VSS
4
NFASTREAD=1 45°C
NFASTREAD=0 45°C
2-5
with ZoomingADC™ and LCD driver
5
1uF
2.4 - 5.5 V
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