參數(shù)資料
型號(hào): W83627SF
英文描述: W83627F plus Smart Card Reader Interface. VID Control. GP I/O?
中文描述: W83627F加上智能卡閱讀器接口。 VID控制。大獎(jiǎng)賽的I / O?
文件頁數(shù): 92/147頁
文件大?。?/td> 1348K
代理商: W83627SF
W83627SF
PRELIMINARY
Publication Release Date: Nov. 2000
Revision 0.60
- 85 -
8. 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 8.1 and 8.2 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 8.1 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.
Table 8.1
SELECTION BIT
0 = OUTPUT
1 = INPUT
INVERSION BIT
0 = NON INVERSE
1 = INVERSE
BASIC I/O OPERATIONS
0
0
Basic non-inverting output
0
1
Basic inverting output
1
0
Basic non-inverting input
1
1
Basic inverting input
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