![Renesas RTK00V2XRC7746SFS Скачать руководство пользователя страница 48](http://html.mh-extra.com/html/renesas/rtk00v2xrc7746sfs/rtk00v2xrc7746sfs_user-manual_1440851048.webp)
Hardware Design Specification
ASD-B-16-0247 Rev1.3
Page 48 of 105
September 8, 2017
RTK00V2XRC7746SFS
3.19
Reset System
3.19.1
Specifications
On the Tethys board, the MCU power-on reset signal is cleared by the reset IC TPS3808G01DBVT, 389ms after the D3.3V
power supply has settled. Also a power-on reset signal can be generated by pushing the push switch (SW4). The reset signal is
level-shifted from 3.3 V to 1.8 V by the HD74LV1G08ACME and is input to the PRESET# pin of the R-Car W2HR-Car W2H.
Table 25 Reset System Specifications
Reset IC
TPS3808G01DBVT from TI
Threshold voltage: 1.7415V
Reset delay time : 389ms (Reset delay time=CT ( nF )/175+0.0005 (s ) )
3.19.2
Block Diagram
U32
MCU
RH850F1H/F1L
CN4
MCU JTAG
IMSA-9632S-26Y801
U8
Reset IC
TPS3808G01DBVT
MR#
BU3.3V
SOC_RST
U5
SPI FLASH
S25FL512SAGMFIG11
SYS_RESETn_33
U7
EMMC
SDIN8DE1-8G-XA
CN4
CPU JTAG
IMSA-9632S-26Y801
U1
R-CarW2H
SYS_RESETn_18
DDR3*2( U3
、
U4)
MT41K256M16HA-125
AAT:E
CN9
Mini PCIE CN
1759546-1
VDD
B
U
3
.3
V
D3.3V
CN8
Mini PCIE CN
1759546-1
CN12
Mini PCIE CN
1759546-1
U16
ETHERNET
KSZ8041RNLI
D1.8V
10K
ResetB
ResetB
ResetB
M0RESET#
RST#
RST_n
RESET
#
RESET#
PRESET#
0
10K
U14
USB HUB
GL852GT-MNGXX
U29
AUDIO CODEC
AK4642EN
SW4
U36
DCDC
R2A11301FT
U9
HD74LV1G08ACME
IN_A
IN_B
OUT_Y
VCC
Figure 20 Block Diagram of the Reset System
MCU_RESETn