DocID027351 Rev 3
39/100
UM1855
Hardware layout and configuration
99
2.16
TFT LCD panel
STM32L476G-EVAL is delivered with MB989P, a daughterboard plugged into the CN19
extension connector. It bears a TFT 2.8-inch color LCD panel with resistive touchscreen and
an on-board controller.
Section 2.18
provides further information.
Thanks to level shifters on all signal lines, the TFT LCD panel can operate with the entire
operating voltage range of STM32L476G-EVAL.
The TFT LCD panel is attached to the 16-bit data bus and accessed with FMC. The base
address is 0x6800 0000, corresponding to NOR/SRAM3 bank1. The panel is selected with
LCD_NE3 chip select signal generated by PG10 port of the STM32L476ZGT6. Address
lines A0 and A1 determine the panel resources addressed, as depicted in
Table 19
.
Table 20
gives the CN19 extension connector terminal assignment.
Table 19. Access to TFT LCD resources with FMC address lines A0 and A1
Address
A1
A0
Usage
0x6800_0000
0
0
Read register
0x6800_0002
0
1
Read Graphic RAM (GRAM)
0x6800_0004
1
0
Write register
0x6800_0006
1
1
Write graphic RAM (GRAM)
Table 20. Assignment of CN19 connector terminals of TFT LCD panel
CN19
terminal
Terminal
name
MCU
port
CN19
terminal
Terminal
name
MCU
port
1
CSN
PG10
2
RS
PF0
3
WRN
PD5
4
RDN
PD4
5
RSTN
RESET#
6
D0
PD14
7
D1
PD15
8
D2
PD0
9
D3
PD1
10
D4
PE7
11
D5
PE8
12
D6
PE9
13
D7
PE10
14
D8
PE11
15
D9
PE12
16
D10
PE13
17
D11
PE14
18
D12
PE15
19
D13
PD8
20
D14
PD9
21
D15
PD10
22
BL_GND
-
23
BL_CONTROL
-
24
+3V3
-
25
+3V3
-
26
26
-
27
GND
-
28
BL_VDD
-
29
SDO
-
30
SDI
-
31
XL
I/O expander_X-
32
XR
I/O exp
33
YD
I/O expander_Y-
34
YU
I/O exp