W90N740CD WINBOND [Winbond], W90N740CD Datasheet - Page 169

• Manufacturer Part Number: W90N740CD
• Description: 32-Bit ARM7TDMI-Based Micro-Controller
• Manufacturer: WINBOND [Winbond]

When the W90N740 is under debugging or verification, software can deactivate any interrupt channel by
setting the corresponding bit in this register. This feature is useful in hardware verification or software
debugging.
SCCx: Source Clear Command
0 = No effect.
1 = Deactivates the corresponding interrupt channels
AIC End of Service Command Register (AIC_EOSCR)
This register is used by the interrupt service routine to indicate that it is completely served. Thus, the
interrupt handler can write any value to this register to indicate the end of its interrupt service.
6.12 General-Purpose Input/Output Controller (GPIO)
The General-Purpose Input/Output (GPIO) module possesses 21 pins and serves multiple purposes.
The Features of the GPIO Controller:
For example, GPIO20 ~ GPIO17 can be programmed as external interrupt input pins, GPIO16 ~ GPIO15
for external DMA function, GPIO14 ~ GPIO13 for TIMER tone output, GPIO12 as the watchdog timeout
flag, GPIO11 ~ GPIO10 used for UART console monitor, GPIO9 ~ GPIO4 for modem. The table as
shown below is a summary.
AIC_EOSCR 0xFFF8.2130
REGISTER
•
•
31
23
15
---
---
---
---
7
Programmable as an input or output pin
Includes de-bouncer circuits on GPIO20, GPIO19, GPIO18, and GPIO17 which can be turned
off if not requir
ADDRESS
30
22
14
---
---
---
---
6
29
21
13
---
---
---
---
5
R/W
W
End of Service Command Register
28
20
12
---
---
---
---
4
- 166 -
W90N740CD/W90N740CDG
DESCRIPTION
27
19
11
---
---
---
---
3
26
18
10
---
---
---
---
2
25
17
---
---
---
---
9
1
RESET VALUE
Undefined
24
---
16
---
---
---
8
0