FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
Table 8. Serial Input Port Definition for DR1=Step/DR2=DC Motor Mode
Reset
Value
Name
Bit
Description
1
1
V2_Enable
Enable bit to turn on and off the V2 regulator and the motor drivers and place the
34920 in the minimum power consumption state.
2
3
4
5
6
7
X
X
X
X
X
0
Not Used
Not Used
Not Used
Not Used
Not Used
Not used in this mode.
Not used in this mode.
Not used in this mode.
Not used in this mode.
Not used in this mode.
DR2_DIR_DCM
Controls the direction of the current flow through the DC motor. A logic [1] level
causes conventional current flow from DR2A1 (source)/DR2A2 (source) to DR2B1
(sink)/DR2B2 (sink).
8
9
1
1
1
SDR1_CURR_I1_PHASEB
SDR1_CURR_I0_PHASEB
SDR1_DIR_PH_B
Second of two inputs that control the current level in the SDR1DR1 step motor
Phase B winding.
One of two inputs that control the current level in the SDR1 step motor Phase B
winding.
10
Controls the direction of the current flow through Phase B of the SDR1 step motor.
A logic [1] level causes conventional current flow from PH_B+ (source) to PH_B-
(sink).
11
12
13
0
1
1
SDR1_CURR_I1_PHASEA
SDR1_CURR_I0_PHASE
SDR1_DIR_PH_A
Second of two inputs that control the current level in the SDR1 step motor Phase A
winding.
One of two inputs that control the current level in the SDR1 step motor Phase A
winding.
Controls the direction of the current flow through Phase A of the SDR1 step motor.
A logic [1] level causes conventional current flow from PH_A+ (source) to PH_A-
(sink).
34920
Analog Integrated Circuit Device Data
Freescale Semiconductor
16
FREESCALE [ Freescale ]
