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| 型號： | GM3120 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | XGA/SXGA LCD Controller |
| 中文描述： | 的XGA / SXGA LCD控制器 |
| 文件頁數(shù)： | 42/51頁 |
| 文件大小： | 1379K |
| 代理商： | GM3120 |
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***
Genesis Microchip Confidential ***
gm5110/20 Preliminary Data Sheet
June 2002
35
C5110-DAT-01C
Genesis recommends using Keil compiler (
http://www.keil.com/
) to compile the firmware
source code into a hex file. This hex file is then downloaded into the external ROM using
commercially available ROM programmers.
For development purposes it may be useful to use a ROM emulator. For example, a
PROMJET ROM emulator can be used (
http://www.emutec.com/pjetmain.html)
.
4.14.3 General Purpose Inputs and Outputs (GPIO’s)
The gm5110/20 has 21 general-purpose input/output (GPIO) pins. These are used by the
OCM to communicate with other devices in the system such as keypad buttons, NVRAM,
LEDs, audio DAC, etc. Each GPIO has independent direction control, open drain enable, for
reading and writing. Note that the GPIO pins have alternate functionality as described in
Table 17 below.
Pin Name
GPIO0/PWM0
GPIO1/PWM1
GPIO2/PWM2
GPIO3/TIMER1
GPIO4/UART_DI
GPIO5/UARD_D0
GPIO6
GPIO7
GPIO8/IRQINn
GPIO9
GPIO10
GPIO11/ROM_WEn
GPIO12/NVRAM_SDA
GPIO13/NVRAM_SCL
GPIO14/DDC_SCL
GPIO15/DDC_SDA
GPIO16/HFSn
GPIO17
GPIO18
GPIO19
GPIO20
GPIO21/IRQn
GPIO22/HCLK
GPO0
GPO1
GPO2
GPO3
GPO4
GPO5
GPO6
GPO7
Pin Number
40
41
42
43
44
45
46
47
39
48
49
50
51
52
6
7
205
1
208
207
206
4
204
119
120
121
122
123
124
125
126
Alternate function
PWM0, PWM1 and PWM2 back light intensity controls, as described in section 4.17.2 below.
Timer1 input of the OCM.
OCM UART data in/out signals respectively.
OCM external interrupt source (IRQINn).
Write enable for external ROM if programmable FLASH device is used.
Data and clock lines for master 2-wire serial interface to NVRAM when gm5110/20 is used in
standalone configuration (section Figure 23).
Clock and data lines for 2-wire serial interface connected to the Direct Data Channel (DDC) of the DVI
input, for passing HDCP keys.
Serial data line for 2-wire host interface.
OCM interrupt output pin.
Serial input clock for 2-wire host interface.
General-purpose outputs.
Table 17. gm5110/20 GPIOs and Alternate Functions
4
4
.
.
1
1
5
5
B
B
o
o
o
o
t
t
s
s
t
t
r
r
a
a
p
p
C
C
o
o
n
n
f
f
i
i
g
g
u
u
r
r
a
a
t
t
i
i
o
o
n
n
P
P
i
i
n
n
s
s
During hardware reset, the external ROM address pins ROM_ADDR[15:0] are configured as
inputs. On the negating edge of RESETn, the value on these pins is latched and stored. This
value is readable by the on-chip microcontroller (or an external microcontroller via the host
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