Rabbit BL2600, User Manual

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User’s Manual 21
3.2.3 High-Current Digital Outputs
The BL2600 has four high-current digital outputs, HOUT0–HOUT3, which can each sink
or source up to 2 A. Figure 9 shows a wiring diagram for using the digital outputs in either
a sinking or a souring configuration.
Figure 9. BL2600 High-Current Digital Outputs
All the digital outputs sink and source actively. They can be used as high-side drivers, low-
side drivers, or as an H-bridge driver. When the BL2600 is first powered up or reset, all
the outputs are disabled, that is, at a high-impedance tristate, until the
digHoutConfig
software function call is made. The
digHoutConfig
call sets the initial state of each
high-current output according to the configuration specified by the user, and enables the
digital outputs to their initial status.
Table 6. BL2600 High-Current Outputs Logic States
U3 Output
High-Current Output
A B
High High
Prohibited
(defaults to sourcing)
High Low Sourcing
Low High Sinking
Low Low High-impedance (tristate)
+HK x
100 k W
330 W
10 k W
10 k W
27 k W
1 nF
100 k W
1 nF
MMBT4401
B
A
(in sinking
mode)
(in sourcing
mode)