User's Manual

Datalogic Scanning, Inc
959 Terry Street
Eugene, Oregon 97402
Page 6 10/23/2009
Revision X2
This value is constrained by the value of the pskey PSKEY_MAX_REMOTE_MASTERS.
The "barge-in" connection sequence (an existing master page-scans, it is paged by new a device, then the
new device's link performs a master/slave switch) implies a temporary scatternet. This pskey does not
affect this behaviour.
See the description of PSKEY_MAX_REMOTE_MASTERS
.
(Type bool is fundamentally a uint16 with values 0 and 1 mapping to FALSE and TRUE.)
Key Name Key Number Type Default Setting
PSKEY_H_HC_FC_MAX_ACL_PKT_LEN 0x0011 uint16 310
The maximum acceptable length, in bytes, of the data portion of HCI ACL data packets received from the
host. This supports the Host_Buffer_Size HCI command.
It sometimes makes sense to tune this value to obtain better device throughput, but the product of the values
of this key and of PSKEY_H_HC_FC_MAX_ACL_PKTS
should be kept constant as this effectively
reserves a block of the device's precious RAM for use by the host.
Key Name Key Number Type Default Setting
PSKEY_H_HC_FC_MAX_SCO_PKT_LEN 0x0012 uint8 64
The maximum acceptable length, in bytes, of the data portion of HCI SCO data packets received from the
host. This supports the Host_Buffer_Size HCI command.
It sometimes makes sense to tune this value to obtain better device throughput, but the product of the values
of this key and of PSKEY_H_HC_FC_MAX_SCO_PKTS
should be kept constant as this effectively
reserves a block of the device's precious RAM for use by the host.
This value should be changed only with great care: small values will heavily load the (host and) chip
processor(s), whereas large values will normally increase audio latency.
Key Name Key Number Type Default Setting
PSKEY_H_HC_FC_MAX_ACL_PKTS 0x0013 uint16 10
The maximum number of HCI ACL data packets being sent to air that can be held within the chip at any
time.
This supports the Host_Buffer_Size HCI command.
See the description of PSKEY_H_HC_FC_MAX_ACL_PKT_LEN
.
Key Name Key Number Type Default Setting
PSKEY_H_HC_FC_MAX_SCO_PKTS 0x0014 uint16 8
The maximum number of HCI SCO data packets being sent to air that can be held within the chip at any
time.