CDC3205G-C Micronas, CDC3205G-C Datasheet - Page 107

• Manufacturer Part Number: CDC3205G-C
• Description: Automotive Controller Family The Device is a Microcontroller For Use in Automotive Applications.the On-chip Cpu is an Arm Processor ARM7TDMI with 32-bit Data And Address Bus, Which Supports Thumb format Instructions.
• Manufacturer: Micronas

PRELIMINARY DATA SHEET
14.4. High Current Ports H0 to H7
High Current Ports 0 to 7 are used to drive coils of stepper
motors. All ports are 4 pins wide to facilitate control of indi-
vidual stepper motors. The H-Ports are similar to universal
ports but as the name says, they can drive higher currents.
H-Ports can be operated by software like Universal Ports
(Port Mode). Their Special Out inputs are connected to the
stepper motor module or to PWM outputs.
Fig. 14–4:
The H-Port pins can be configured for several basic operat-
ing modes (Table 14–4)
Table 14–4:
See the chapter on Pinning for information about specific
hardware module connections to individual port pins for Spe-
cial Input and Special Output purposes.
H-Port control is distributed among five registers. All register
bits corresponding to one H-Port pin are controlled by the
same bus bit.
After reset, all H-Ports are in Normal, Output, Low, CMOS
input level condition.
Micronas
Mode
Normal Input
Special Input
Normal Output
Special Output
Special Out
Special In
HxLVL.Cy
HxPIN.Py
HxTRI.Ty
HxNS.Sy
HxD.Dy
High Current Port Pin Circuit Diagram
High Current Port basic Operating Modes
Function
The SW uses the port as digital
input.
The port input is additionally con-
nected to specific hardware mod-
ules.
The SW uses the port as latched
digital tristateable output.
The output signals of specific
hardware modules are directly
port output source.
0
1
June 12, 2003; 6251-579-1PD
&
&
HV
HV
DD
SS
Control
Control
Slew
Slew
Rate
Rate
Features
– Pin-configurable as I/O or Special Port driver
– 30mA output current
– Schmitt hysteresis input buffer, CMOS level (2.5V) or
– Reduced slew rate of current and voltage for driving resis-
The function of the five registers is given in Table 14–5.
Table 14–5:
The Special Input path is always operative. This allows
manipulating the input signal to the specific hardware mod-
ule through Normal Output operations by software.
Because register HxPIN allows reading the pin level also in
Special Output mode, the output state of the specific hard-
ware module may be read by the CPU.
Two high current ports together with a coil build a H-bridge.
Two H-bridges are necessary to operate a stepper motor.
The n-channel and the p-channel transistor of the output
driver are controlled separately, to eliminate crossover cur-
rents.
The reset output levels of the ports are low to avoid floating
coils.
Register
HxD
HxTRI
HxNS
HxLVL
HxPIN
Automotive level (3.3V) selectable.
tive, capacitive or inductive loads.
HV
HV
DD
SS
Register Functions
Function
r/w Data register
enable/disable output
select Data register or specific hardware
module as output source
select CMOS or Automotive Schmitt trigger
input level
read pin state
x: Port number 0 to 7
y: Port pin number 0 to 3
CDC 32xxG-C
Hx.y
105