Limitations And Hardware Configuration - Etm Trace (Cn15); Table 4. Etm Trace Hardware Configuration - ST STM32H7B3I-EVAL User Manual

6.2.2

Limitations and hardware configuration - ETM trace (CN15)

Limitations: Wi‑Fi
If the best performance of ETM is required (84 MHz/98 MHz), refer to
Signal name
WIFI_SPI4_SCK
FMC_A23
TRACECLK
WIFI_SPI4_NSS
SAI1_SD_B
FMC_A19
JTAG_TDO (PB3)
TRACED0
SAI1_FS_A
FMC_A20
JTAG_TRST (PB4)
DCMI_D4
TRACED1
WIFI_SPI4_MISO
SAI1_SCK_A
FMC_A21
TRACED2
WIFI_SPI4_MOSI
SAI1_SD_A
FMC_A22
TRACED3
RGB_LCD_G0
TRGIN
RGB_LCD_B0
TRGOUT
1. Trace configuration is in bold.
2. Remove to avoid stub if necessary.
Remark:
• R69 must be removed to avoid conflict with the WIFI_SPI4_MISO output, but it is also recommended to
remove R343, R337, R116, and R334 to have the best signal quality. With these changes, ETM trace 4-bits
is successfully tested in DDR with the ULINK PRO up to 108MHz (CPU at 280 MHz) but the timing of the
data [3:0] sampling must be adjusted on the ULINK pro: CLK: +0 ns (no change) / D [3:0]: ~ 2.5 ns.
UM2662 - Rev 1
®
, LCD, SAI, FMC A19-22 cannot be used at the same time as TRACE.
Table 4. ETM trace hardware configuration
Pin name
PE2
PE3
PE4
PE5
PE6
PJ7
PJ12
External JTAG, SWD, and trace
Table 4. ETM trace hardware
Setting JTAG / TRACE
R343
R342
R101
R337
JP34
R97
R390
R93
JP26
R88
R372
R116
R340
R69
JP28
R324
R71
R334
JP27
R78
R80
R315
R64
R259
R34
UM2662
configuration.
(1)
OFF (2)
(2)
OFF
ON
(2)
OFF
OFF (2)
(2)
OFF
OFF (2)
ON
OFF (2)
(2)
OFF
OFF (2)
(2)
OFF
ON
(2)
OFF
(2)
OFF
(2)
OFF
ON
(2)
OFF
(2)
OFF
(2)
OFF
ON
(2)
OFF
ON
(2)
OFF
ON
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