Tft Lcd Panel; Table 22. Access To Tft Lcd Resources With Fmc Address Lines A0 And A1; Table 23. Assignment Of Cn19 Connector Terminals To Tft Lcd Panel - ST STM32L476ZG User Manual

UM1855
6.16

TFT LCD panel

STM32L476G-EVAL is delivered with MB989, a daughterboard plugged into the extension
connector (CN19). It bears a TFT 2.8-inch color LCD panel with a resistive touchscreen and
an onboard controller.
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
the LCD_NE3 chip select signal generated by the PG10 port of the STM32L476ZG.
Address lines A0 and A1 determine the panel resources addressed, as depicted in
Table 23

Table 22. Access to TFT LCD resources with FMC address lines A0 and A1

Table 23. Assignment of CN19 connector terminals to TFT LCD panel

CN19
terminal
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
Section 6.18
gives the extension connector (CN19) terminal assignment.
Address
0x6800_0000
0x6800_0002
0x6800_0004
0x6800_0006
Terminal
name
CSN
WRN
RSTN
D1
D3
D5
D7
D9
D11
D13
D15
BL_CONTROL
+3V3
GND
SDO
XL I/O expander_X-
YD I/O expander_Y-
provides further information.
A1 A0
0 0
0 1
1 0
1 1
MCU CN19
port terminal
PG10 2
PD5 4
RESET# 6
PD15 8
PD1 10
PE8 12
PE10 14
PE12 16
PE14 18
PD8 20
PD10 22
- 24
- 26
- 28
- 30
32
34
UM1855 Rev 6
Hardware layout and configuration
Usage
Read register
Read Graphic RAM (GRAM)
Write register
Write graphic RAM (GRAM)
Terminal
name
RS
RDN
D0
D2
D4
D6
D8
D10
D12
D14
BL_GND
+3V3
26
BL_VDD
SDI
XR I/O expander_X+
YU I/O expander_Y+
Table 22.
MCU
port
PF0
PD4
PD14
PD0
PE7
PE9
PE11
PE13
PE15
PD9
-
-
-
-
-
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