3.4.3 Boot Modes
The boot mode for the processor is determined by a bank of DIP switches (SW8, SW9). All of the boot mode
pins have weak pull down resistors and a switch capable of connecting to a strong pull up resister, as shown in
. Note that OFF setting provides a low logic level (‘0’) and an ON setting provides a high logic level
(‘1’).
SWITCH ON = LOGIC 1
SWITCH OFF = LOGIC 0
DIR = H: A -> B
SWITCH ON = LOGIC 1
SWITCH OFF = LOGIC 0
DIR = H: A -> B
I2C ADDRESS: 0x22
TP1
TP2
DIR1
Place Tp1 and Tp2 with 100mils
spacing to insert external jumper
SYS_BOOTMODE0
SYS_BOOTMODE2
SYS_BOOTMODE3
SYS_BOOTMODE4
SYS_BOOTMODE5
SYS_BOOTMODE6
SYS_BOOTMODE7
SYS_BOOTMODE1
MCU_BOOTMODE02
MCU_BOOTMODE04
MCU_BOOTMODE05
MCU_BOOTMODE06
MCU_BOOTMODE07
MCU_BOOTMODE08
MCU_BOOTMODE03
DIR2
BOOTMODEON_IN1
BOOTMODEON
MCU_BOOTMODE09
TCA6424_EXP_INT
BOOTBUF_ADDR
MCU_BOOTMODE09
MCU_BOOTMODE02
MCU_BOOTMODE04
MCU_BOOTMODE05
MCU_BOOTMODE06
MCU_BOOTMODE07
MCU_BOOTMODE08
MCU_BOOTMODE03
VSYS_3V3
DGND
DGND
DGND
VSYS_MCUIO_3V3
DGND
DGND
VSYS_3V3
VSYS_3V3
DGND
DGND
DGND
DGND
DGND
D5%D
VSYS_IO_3V3
VSYS_3V3
VSYS_3V3
DGND
VSYS_3V3
VSYS_3V3
VSYS_3V3
DGND
VSYS_3V3
DGND
VSYS_3V3
DGND
(20) SYSBOOT_BUF_ENz
BUF_SYS_BOOTMODE0 (11)
BUF_SYS_BOOTMODE1 (11)
BUF_SYS_BOOTMODE2 (11)
BUF_SYS_BOOTMODE3 (11)
BUF_SYS_BOOTMODE4 (11)
BUF_SYS_BOOTMODE5 (11)
BUF_SYS_BOOTMODE6 (11)
BUF_SYS_BOOTMODE7 (11)
BUF_MCU_BOOTMODE2 (11)
BUF_MCU_BOOTMODE3 (11)
BUF_MCU_BOOTMODE4 (11)
BUF_MCU_BOOTMODE5 (11)
BUF_MCU_BOOTMODE6 (11)
BUF_MCU_BOOTMODE7 (11)
BUF_MCU_BOOTMODE8 (11)
BUF_MCU_BOOTMODE9 (11)
(56,62,64) PM2_SDA
(56,62,64) PM2_SCL
(56) TA_BM_IOEXP_RSTn
R331
1K 1%
R321
1K 1%
O
N
1
2
3
4
5
6
7
8
Sw9
218-8LPSTR
1
2
3
6
8
7
4
5
9
10
1
1
12
13
14
15
16
R769
10K
1.4
R3&
'
R324
1K 1%
O
N
1
2
3
4
5
6
7
8
Sw8
218-8LPSTR
1
2
3
6
8
7
4
5
9
10
1
1
12
13
14
15
16
R319
1K 1%
C617
0.1uF
50V
1.4
R3&7
R318
1K 1%
1.4
R3&&
R363
1.4
R330
1K 1%
TP135
1.4
R3&5
R362
1.4
C618
0.1uF
50V
R316
1K 1%
U151
SN74LVC1G08DBVRE4
1
2
4
3
5
R3&4
1.4
1.4
R361
R323
1K 1%
R329
1K 1%
C645
0.01uF
25V
C616
0.1uF
50V
C619
0.1uF
50V
1.4
R371
R360
1.4
R328
1K 1%
1.4
R37.
U147
TCA6424ARGJR
P00
1
P01
2
P02
3
P03
4
P04
5
P05
6
P06
7
P07
8
P20
17
P21
18
P22
19
P23
20
P24
21
P25
22
P26
23
P27
24
25
GND
ADDR
26
27
VCCP
RESET
28
SCL
29
SDA
30
31
VCC
INT
32
P10
9
P11
10
P12
11
P13
12
P14
13
P15
14
P16
15
P17
16
EP
33
1.4
R359
R768
10K
U149
SN74AVC8T245RHL
1
VCCA
DIR
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
10
OE
22
23
VCCB1
24
VCCB2
B1
21
B2
20
B3
19
B4
18
B5
17
B6
16
B7
15
B8
14
1
1
GND1
12
GND2
13
GND3
EP
25
1.4
R3&/
R777
10K
Tp136
1.4
R358
R322
1K 1%
R320
1K 1%
R325
1K 1%
R914
10K
R357
1.4
R326
1K 1%
R356
1.4
R779
10K
R317
1K 1%
R793
10K
C629
0.1uF
50V
U148
SN74AVC8T245RHL
1
VCCA
DIR
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
A8
10
OE
22
23
VCCB1
24
VCCB2
B1
21
B2
20
B3
19
B4
18
B5
17
B6
16
B7
15
B8
14
1
1
GND1
12
GND2
13
GND3
EP
25
R327
1K 1%
R792
0E
Figure 3-7. BOOT Switches Provided on the Processor Card
provide the switch map to the boot mode functions. For specific settings for each
boot interface, see
DRA829/TDA4VM/AM752x Technical Reference Manual
. The selectable boot interfaces
supported on the EVM include: Octal-SPI, Quad-SPI, HyperFlash, SD-Card, eMMC, PCIe (as endpoint), CPSW,
USB, UFS, UART, and EERPOM.
Table 3-8. Wakup Boot Mode Switch (SW9)
Wakeup Boot Pin Map
0:1
(Fixed to
‘00’)
2
(SW9.1=
OFF)
3
(SW9.2)
4
(SW9.3)
5
(SW9.4)
6
(SW9. 5)
7
(SW9.6)
8
(SW9.7)
9
(SW9.8)
PLL Configuration (Fixed to
19.2 MHz)
Primary Boot Mode A
MCU Only
Rsvd
Rsvd (not for boot use)
Table 3-9. Main Boot Mode Switch (SW8)
Wakeup Boot Pin Map
0
(SW8.1)
1
(SW8.2)
2
(SW8.3)
3
(SW8.4)
4
(SW8.5)
5
(SW8.6)
6
(SW8.7)
7
(SW9.8)
Primary Boot
Mode B
Backup Boot Mode
Primary Boot Mode Config
Backup Boot
Mode Config
EVM User Setup/Configuration
SPRUIS4D – MAY 2020 – REVISED MARCH 2022
Jacinto7 J721E/DRA829/TDA4VM Evaluation Module (EVM)
21
Copyright © 2022 Texas Instruments Incorporated