MC9S08GB60 Datasheet, PDF (95/290 Pages) Motorola, Inc – Microcontrollers

Parallel I/O Registers and Control Bits
PTGDDn — Data Direction for Port G Bit n (n = 0–7)
These read/write bits control the direction of port G pins and what is read for PTGD reads.
1 = Output driver enabled for port G bit n and PTGD reads return the contents of PTGDn.
0 = Input (output driver disabled) and reads return the pin value.
MC9S08GB/GT Data Sheet, Rev. 2.3
Freescale Semiconductor
95