E-STLC2416 STMicroelectronics, E-STLC2416 Datasheet - Page 21

• Manufacturer Part Number: E-STLC2416
• Manufacturer: STMicroelectronics

Specifications of E-STLC2416

• Lead Free Status / Rohs Status: Compliant

General specification
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General specification
System clock
The E-STLC2416 works with a single clock provided on the XIN pin. The value of this
external clock should be any integer value from 12 … 33 MHz ±20ppm (overall).
Slow clock
The slow clock is used by the baseband as reference clock during the low power modes.
The slow clock requires an accuracy of ±250ppm (overall).
Several options are foreseen in order to adjust the E-STLC2416 behavior according to the
features of the radio used:
Boot procedure
The boot code instructions are the first that ARM7TDMI executes after a HW reset. All the
internal device's registers are set to their default value.
There are 2 types of boot:
When boot pin is set to `1` (connected to VDD), the E-STLC2416 boots on its flash
When boot pin is set to `0` (connected to GND), the E-STLC2416 boots on its internal ROM
(needed to download the new firmware in the flash). When booting on the internal ROM, the
E-STLC2416 will monitor the UART interface for approximately 1.4 second. If there is no
request for code downloading during this period, the ROM jumps to flash.
Clock detection
The E-STLC2416 has an automatic slow clock frequency detection (32kHz, 3.2kHz or
none).
If the system clock (e.g. 13MHz) is not provided at all times (power consumption
saving) and no slow clock is provided by the system, a 32 kHz crystal must be used by
the E-STLC2416 (default mode).
If the system clock (e.g. 13MHz) is not provided at all times (power consumption
saving) and the system provides a slow clock at 32kHz or 3.2kHz, this signal is simply
connected to the E-STLC2416 (lpo_clk_p).
If the system clock (e.g. 13MHz) is provided at all times, the E-STLC2416 generates
from the reference clock an internal 32kHz clock. This mode is not an optimized mode
for power consumption.
Flash boot.
UART download boot from ROM.
E-STLC2416