Need suggestion for developing M8 robot PCB

[pratikmahale]

I am making a PCB for robot car using AT Mega 8 MCU with following feachers

AVRISP 10 pin Port
5 Volt DC converter Using 7805 IC
10 uH inductor for DC voltage filtering
Reset switch
LED for power indicator
Power On/Off Switch
On board crystal oscillator

16 * 2 LCD (in 4 bit mode)
Connection details of LCD module
Pin no 4 (RS) to PC2
Pin no 5 (R/W) to GND
Pin no 6 (E) to PC1
Pin no 11 (DB4) to PC0
Pin no 12 (DB5) to PB5
Pin no 13 (DB6) to PB4
Pin no 14 (DB7) to PB3

4 pin Serial communication port TTL only (+5 , GND, RxD,TxD)
PD0 /RxD is shared with 38kHz Infrared receiver module
PD1/TxD is shared to drive an indicator LED-1 with current-limit resistor

L293D Dual DC Motor Controller with speed controller using PWM & using single pin with inverter for direction control
Connection details of L293D

Pin no 1 (1,2 EN) to PB1/OC1A
Pin no.9 (3,4 EN) to PB2/OC1B

Pin no 2 (1A) to PD6 (directly)
Pin no 7 (1B) to PD6 (using single transistor inverter)

Pin no 10 (2A) to PD7 (directly)
Pin no 15 (2B) to PD7 (using single transistor inverter)


2 PUSH BUTTON SWITCHS
PD2/INT0 to Switch-1
PD3/INT1 to Switch-2

Piezo Speaker to PD4/T0

Indicator LED-2 to PB0

3 Sensor Input (Can be use for line sensor or Analog input)

PC3, PC4 & PC5

Remaining one pin PD5 can be used do drive servo motor on which we can mount any sensor
I have taken some idea from Microcamp ATmega 8 activity kit

I am still confused between L293D & L298 the motor controller ICs
Which one is a better choice?

If you have any suggestion about the board please let me know

[lolman_returns]

The decision towards using a certain motor driver depends on the current consumption of the motors. l298 can source more than L293D. But you will have to use up space for the reverse current protection diodes for the L298 which are already present in the L293D. I would go for L298 any day given the current choice as L298 gives me a wider range of motor choices ( there are a lot better motor driver ICs out there).

[pratikmahale]

Thanks for your suggestion lolman_returns
I completed my PCB artwork with all the features I already mention & single L298 to drive two DC motors.
I will do final testing of the art work in next two days & give it to develop in next week