UM1547 datasheet(46/51 Pages) STMICROELECTRONICS

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FW configuration variables

UM1547

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DocID023232 Rev 5

Var17

GPIO_HostKeepAwake

None

GPIO register used to prevent the module from

entering deep sleep mode. A setting of none

means that this function is disabled. Typically

GPIO 3 supports this feature.

Var18

GPIO_HostWakeup

None

GPIO register used to wake up the module after it

enters deep sleep mode. A setting of none means

that this function is disabled. Typically GPIO 3

supports this feature.

Var19

UseSmallPackets

False

If true, only DM1, DH1, DM3, DH3 packets are

allowed on a link. EDR is disabled.

Var20

EnableAFH

True

Enable/Disable the Adaptive Frequency Hopping

mode.

Var21

EnablePowerControl

True

Enable/Disable the Bluetooth Dynamic power

control feature. Not supported

Var22

HostFlowControl

Reserved for future usage.

Var23

ATReply

AT-AB

Sets the AT command reply prefix. All events that

are displayed are prefixed by this character string

(case sensitive).

Var24

QoS_Latency

Sets the Quality of Service Latency from 3 to 40

slots. A slot period is 625 microseconds

Var25

CpuMHz

Sets the module’s CPU speed: 2, 4, 8, 12, 16, 20,

24, 28, 32, 36 and 64 MHz are allowed. (Note:

CPUMHz: 40 to 63 are not supported.)

Var26

HciBaudrate

921600

Baud rate of the HCI interface to the Bluetooth

controller: 115,200; 230,400; 460,800; 921,600

and 2,000,000 baud are allowed.

Var27

SPIEnable

False

Enables the SPI interface to external pins. (Not

supported)

Var28

SPIMode

Slave

Mode of the SPI. (Not supported)

Table 13. AT2 FW version 1.6 system configuration settings - version 1.5A (continued)

Variable

Name

Default

Description

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