User`s guide

22 • Registers

4.4 General Purpose Timer/Counter Control Register

Address: BASE + 0x20

Attribute: write only

Data Format:

Bit

7 6 5 4 3 2 1 0

Counter

Down

src

Gate_s

Clk_sr

--- MODE1

MODE

Bit

15 14 13 12 11 10 9 8

--- --- --- --- --- --- ---

Bit

23 22 21 20 19 18 17 16

--- --- --- --- --- --- --- ---

Bit

31 30 29 28 27 26 25 24

--- --- --- --- --- --- --- ---

Table 5. General Purpose Timer/Counter Control Register

Counter en (bit7): GPTC0 count enable

1: enable GPTC0

0: disable GPTC0

UpDown (bit6): GPTC0’s up/down pin software control

1: Up counter

0: Down counter

UpDown src(bit5): GPTC0’s up/down pin selection bit

1: External input (Pin 98)

0: Software Control

Gate_src (bit4): GPTC0’s gate source

1: External Input (Pin 97)

0: gate controlled by setting the enable (bit7)