W83627SF-AW Winbond, W83627SF-AW Datasheet - Page 67

• Manufacturer Part Number: W83627SF-AW
• Manufacturer: Winbond

Specifications of W83627SF-AW

• Pin Count: 128
• Lead Free Status / RoHS Status: Not Compliant

10. GENERAL PURPOSE I/O
W83627SF provides 42 input/output ports that can be individually configured to perform a simple basic
I/O function or a pre-defined alternate function. These 42 GP I/O ports are divided into seven groups.
GP1 is configured through control registers in logical device 7, GP2 in logical device 8, GP3 and GP4
in logical device 9, GP5, GP6, and GP7 in logical device C. Users can configure each individual port
to be an input or output port by programming respective bit in I/O selection register (0 = output, 1 =
input). Invert port value by setting inversion register (0 = non-inverse, 1 = inverse). Port value is
read/written through data register. Table 10.1 and 10.2 gives more details on GPIO's assignment. In
addition, GP3 and GP4 are designed to be functional even in power loss condition (VCC is off).
Figure 10.1 shows the GP I/O port's structure. Right after Power-on reset, those ports default to
perform basic input function except ports in GP3 and GP4 which maintain their previous settings until
a battery loss condition.
SELECTION BIT
GP I/O PORT DATA REGISTER
0 = OUTPUT
1 = INPUT
0
0
1
1
GP1
0 = NON INVERSE
INVERSION BIT
1 = INVERSE
0
1
0
1
REGISTER BIT ASSIGNMENT
Table 10.1
Table 10.2
Basic non-inverting output
Basic inverting output
Basic non-inverting input
Basic inverting input
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BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BASIC I/O OPERATIONS
Publication Release Date: May 31, 2005
GP I/O PORT
W83627SF
GP10
GP11
GP12
GP13
GP14
GP15
GP16
GP17
Revision A1