CDC3205G-C Micronas, CDC3205G-C Datasheet - Page 103

• 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
14.2. Universal Ports U0 to U8
Universal Ports are pin-configurable as SW I/O port, Special
Input/Output port (SI/SO) to special internal hardware mod-
ules or direct drive of 4:1 multiplexed LCD segment and
backplane lines (LCD port).
The output drivers feature a current fold-back characteristic
to allow shorting the output and to improve EMI performance.
Fig. 14–2:
The Universal Port pins can be configured for several basic operating modes (Table 14–1)
Table 14–1:
See the chapter on Pinning for information about specific
hardware module connections to individual port pins for Spe-
cial Input and Special Output purposes.
Universal Port control is distributed among eight registers.
Four of these registers have duplicate functions for Port and
LCD mode. All register bits corresponding to one U-Port pin
are controlled by the same bus bit.
In both LCD and Port modes, the SLOW mode may be
defined for each individual U-Port pin. It reduces the current
drive capability of the output stage. Set flag SR0.PSLW to
enable this operation mode.
Micronas
Modes
Port Mode
LCD Mode
UxMODE.Ly
UxSLOW.Sy
Special Out
UxDPM.Dy
From LCD
Special In
UxLVL.Cy
UxPIN.Py
UxTRI.Ty
UxNS.Sy
wake in
UxD.Dy
Universal Port Pin Circuit Diagram
Universal Port basic Operating Modes
Normal Input
Special Input
Normal Output
Special Output
0
1
MUX
Function
The SW uses the port as digital input.
The port input is additionally connected to specific hardware modules.
The SW uses the port as latched digital tristateable output.
The output signals of specific hardware modules are directly port output source.
The port pin serves as backplane/segment driver for a 4:1 multiplexed LC display
Analog Switch and
Segment Driver
June 12, 2003; 6251-579-1PD
&
1
UV
UV
DD
SS
Current
Current
Back
Back
Fold
Fold
Features
– Pin-configurable as I/O or Special Port or LCD driver.
– LCD mode: 1:4 multiplex, 5V supply.
– PORT mode: push-pull or open-drain output.
– Two output current fold-back characteristics selectable
– Schmitt hysteresis input buffer, CMOS level (2.5V) or
After reset, all Universal Ports are in Port, Normal, tristate,
CMOS input level condition. SLOW mode is disabled.
14.2.1. Port Mode
For Port mode, the respective UxMODE register bit has to be
cleared for mode selection.
Automotive level (3.3V) selectable.
2
1
UV
UV
/
/
3
3
UV
UV
DD
SS
DD
DD
0
1
x: Port number 0 to 8
y: Port pin number 0 to 7
CDC 32xxG-C
Ux.y
101