The connection update parameters represent the values used to update the settings of a Bluetooth
Low Energy connection between two peer devices. The IS187x device uses these parameters in Auto Operation mode to request an
update to the timings of an established Bluetooth Low Energy connection. The IS187x device tries to update the established connection
with the settings specified; however, the central device controls if these parameters
are used to modify the established connection. The IS187x
IC chip only uses these parameters in Auto Operation mode. For more details on this
connection update parameter request procedure and how the following parameters affect
the connection, refer to the Bluetooth Core Specification (4.2), volume 6, part B, section 5.1.1.
In Manual Operation mode, the external host MCU uses specific commands to control or request an update of the parameters in an established connection. The parameters must be programmed to a value of 0xFF. Use the IS187x device in Manual Operation mode to avoid undefined device operation. If running in Auto Operation mode, not programming values within the valid ranges results in undefined device operation (see the following table).
Table 12-27. Minimum LE Connection Interval Parameter Table| Parameter | Value | Parameter Description | Length |
|---|
| 0x35-0x36 | 0xXXXX | - Valid range – 0x0010-0x0C80
- Stored in memory as Big Endian
- Program as 0xFFFF if device operates in Manual Operation mode; unit is 1.25 ms
| 2 bytes |
Table 12-28. Maximum LE Connection Interval Parameter Table| Parameter | Value | Parameter Description | Length |
|---|
| 0x37-0x38 | 0xXXXX | - Valid range – 0x0010-0x0C80
- Stored in memory as Big Endian
- If device operates in Manual Operation mode, program as 0xFFFF; unit is 1.25 ms
| 2 bytes |
Table 12-29. Maximum LE Peripheral Latency Parameter
Table| Parameter | Value | Parameter Description | Length |
|---|
| 0x39-0x3A | 0xXXXX | - Valid range – 0x0000-0x01F3
- Stored in memory as Big Endian
- If device operates in Manual Operation mode, program as 0xFFFF
- Number of connection events
| 2 bytes |
Table 12-30. LE Supervision Timeout Parameter Table| Parameter | Value | Parameter Description | Length |
|---|
| 0x3B-0x3C | 0xXXXX | - Valid range – 0x000A-0x0C80
- Stored in memory as Big Endian
- If device operates in Manual Operation mode, program as 0xFFFF; unit is 10 ms.
| 2 bytes |
