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SR/AI
SR/AP
Hardware Reference
Release r09
Page 30 of 76
5.4 Environmental Requirements
Item
Symbol Absolute Maximum Ratings
Unit
Storage temperature range
T
stg
-40 to +85
°C
Operating temperature range
T
op
-30 to +85
°C
Table 9: Environmental Requirements
5.5 Digital I/O Including EXT-RES#
STM32 MCU and CSR8811 do have different electrical I/O characteristics.
All Module I/O pins are connected directly to these chips without signal conditioning except for
some pull-up/pull-down resistors (as indicated). Therefore the electrical characteristics are split in
different tables.
STM-Related Signals:
EXT-RES# (additional filter-C 100n to GND)
UART-TXD, UART-RXD, UART-CTS#
UART-RTS# (additional pull-up resistor 470k
Ω)
IUR-IN#
IUR-OUT# (additional pull-up resistor 470k
Ω)
GPIO[0..8], TESTMODE#
BOOT0 (additional pull-down resistor 100k
Ω)
Summary of Contents for BlueMod+SR/AI
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