w83627thg Winbond Electronics Corp America, w83627thg Datasheet - Page 26

• Manufacturer Part Number: w83627thg
• Description: Winbond Lpc I/o
• Manufacturer: Winbond Electronics Corp America

4. GENERAL PURPOSE I/O
W83627THF provides 36 input/output ports that can be individually configured to perform a simple
basic I/O function or a pre-defined alternate function. Those 36 GP I/O ports are divided into five
groups . The first and fifth groups are configured through control registers in logical device 7, the
second group in logical device 8, and the third and forth groups in logical device 9. Users can
configure each individual port to be an input or output port by programming respective bit in selection
register (CRF0/F3: 0 = output, 1 = input). Invert port value by setting inversion register (CRF2/F5: 0 =
non-inverse, 1 = inverse). Port value is read/written through data register (CRF1/CRF4). Table 4-1
and 4-2 give more details on GPIO's assignment. Figure 4-1 shows the GP I/O port's structure. After
power-on reset those ports default to perform basic input function which maintains its previous settings
until a battery loss condition.
GP I/O PORT DATA REGISTER
SELECTION BIT
0 = OUTPUT
1 = INPUT
GP1(VCC POWER)
GP2(VCC POWER)
0
0
1
1
0 = NON INVERSE
INVERSION BIT
1 = INVERSE
REGISTER BIT ASSIGNMENT
0
1
0
1
Table 4-1
- 19 -
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
W83627THF/W83627THG
Basic non-inverting output
Basic inverting output
Basic non-inverting input
Basic inverting input
Publication Release Date: September 26, 2006
BASIC I/O OPERATIONS
GP I/O PORT
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
GP20
GP21
GP22
GP23
GP24
GP25
GP26
Revision 1.2