mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 387

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

18.5 Port C
18.5.1 Port C Data Register (PTC)
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Alternative Function:
Additional Function: LED drive LED drive LED drive LED drive LED drive LED drive LED drive LED drive
Address:
Port C is an 8-bit special function port that shares all of its port pins with
the liquid crystal display (LCD) driver module.
Port pins PTC0–PTC7 can be configured for direct LED drive.
The port C data register contains a data latch for each of the eight port C
pins.
PTC[7:0] — Port C Data Bits
FP[26:19] — LCD Driver Frontplanes 26–19
LED drive — Direct LED Drive Pins
Reset:
Read:
Write:
These read/write bits are software programmable. Data direction of
each port C pin is under the control of the corresponding bit in data
direction register C. Reset has no effect on port C data.
FP[26:19] are pins used for the frontplane output of the LCD driver
module. The enable bits, PCEH and PCEL, in the CONFIG2 register,
determine whether the PTC7/FP26–PTC4/FP23 and
PTC3/FP22–PTC0/FP19 pins are LCD frontplane driver pins or
general-purpose I/O pins. See
(LCD)
PTC0–PTC7 pins can be configured for direct LED drive. See
Port C LED Control Register
$0002
PTC7
FP26
Bit 7
Figure 18-9. Port C Data Register (PTC)
Driver.
Input/Output (I/O) Ports
PTC6
FP25
6
PTC5
FP24
5
Unaffected by reset
PTC4
FP23
Section 17. Liquid Crystal Display
(LEDC).
4
PTC3
FP22
3
PTC2
FP21
2
Input/Output (I/O) Ports
PTC1
FP20
1
Data Sheet
18.5.3
PTC0
FP19
Bit 0
Port C
387