L99DZ100GP datasheet(76/197 Pages) STMICROELECTRONICS

76 / 197 page

Application information

L99DZ100G, L99DZ100GP

76/197

DS11546 Rev 5

Note:

See also Figure 31: CAN transceiver state diagram.

4.3.7

VBAT_standby mode

The transition from Active mode to Vbat_standby mode is initiated by an SPI command. In

Vbat_standby mode, the voltage regulators V1 and V2 (depending on configuration in

CR 1), the power outputs (except OUT15 and OUT_HS) as well as LIN and CAN

transmitters are switched off.

An NReset pulse is generated upon wake-up from Vbat_standby mode. At transition into

Vbat_standby mode with selective wake-up enabled (SWEN = 1), the CAN transceiver is

automatically set to TRX_standby configuration (RXEN = 0).

4.4

Wake-up from Standby modes

A wake-up from standby mode will switch the device to Active mode. This can be initiated by

one or more of the following events:

To prevent the system from a deadlock condition (no wake up from standby possible) a

configuration where the wake up by LIN and HS CAN are both disabled is not allowed. All

wake-up sources are configured to default values in case of such invalid setting. The SPI

Error Bit SPIE (Global Status Byte) is set.

2. Interrupt can be disabled by SPI (CANTO_IRQ_EN).

3. SW_EN = 0, PWN_EN = 1 (Pretended Networking mode)



— no wake-up



— after reception of a wake-up patter (WUP) the transceiver enters TRX Bias mode



— Flags: WUP

Table 62. Wake-up events description

Wake up source

Description

LIN bus activity

Can be disabled by SPI

CAN bus activity

Can be disabled by SPI



Selective Wake-up can be enabled and configured by SPI

Level change of WU

Can be configured or disabled by SPI

IV1 >Icmp_ris

Device remains in V1_standby mode but watchdog is enabled (If

ICMP = 0). No interrupt is generated.

Timer Interrupt / Wake up

of µC by TIMER

Programmable by SPI:

– V1_standby mode: configurable timer interrupt. NINT and RxDL/NINT

interrupt signals are generated

– Vbat_standby mode: device wakes up after programmable timer

expiration, V1 regulator is turned on and NReset signal is generated

SPI Access

Always active (except in VBAT_STANDBY mode)

Wake up event: CSN is low and first rising edge on CLK

L99DZ100GP Datasheet(PDF) 76 Page - STMicroelectronics

L99DZ100GP Datasheet(HTML) 76 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL