Fujitsu FR81S User Manual
CHAPTER 49: BUS DIAGNOSIS FUNCTION
3. Configuration
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : BUS DIAGNOSIS FUNCTION
FUJITSU SEMICONDUCTOR CONFIDENTIAL
6
Figure 3-2 Bus diagnosis target area diagram
From Master
To Slave
To Slave
From Master
To Slave
To Slave
I /
O
Po
Po
rt
XBS Crossbar Switch
FR81s CPU core
Instruction
Data
O n ch ip bus layer 2
External Bus
I / F
Peripheral Bus
Bridge
CAN prescaler
Watchdog timer(SW and HW)
Delay intrrupt
Interrupt controller
RTC／WDT1 Calibration
Ｉ
/Ｏ port setting
Low power consumption setting register
16
32
Wild register
I /
O
Po
rt
O n ch ip bus layer 1
Debug Interface
Regulator
Interrupt request batch read
DMA transfer request generate/clear
Real time clock
Clock supervisor
O
n
chi
p
bu
s(
AH
B)
XB
S
Clock control （Clock setting,
Main timer, Sub timer, PLL timer）
M P U
32
bi
tP
er
ip
he
ra
lB
us
(A
P
B
)
Clock control （devide control）
Bus
performance
counter
16
bit
P
er
ip
he
ra
lB
us
BackUp
RAM
Timing Protection
Unit
PPG(48ch)
Reload timer (8ch)
8bit DA converter (2ch)
External interrupt input(16ch)
32bit Output compare(6ch)
Base timer (2ch)
U/D counter (2ch)
32bit Free-run timer(3ch)
32bit Input capture(6ch)
Multi-function serial interface (12ch)
DMAC
(16 ch)
CAN (3ch)
CRC
Operation mode
register
Wave generator (6ch)
12bit AD converter (32ch + 16ch)
16bit Free-run timer (3ch)
16bit Input capture (4ch)
Power-on rset
CR oscillator
Low voltage detection
（
External power supply low voltage detection）
Reset control register
NMI
Flash
・
Main Flash 256K/384K/5 12 K/768K/
1024 KB
・
W o rkFlash 64KB
RAM
48K/64K/96K/128K
Clock monitor
Bus Bridge (32bit <-> 16bit)
RAM ECC Control(XBS RAM)
Clock / Bus
Bridge
RAM ECC Control
(BackUp RAM)
Async Bus Bridge (PCLK1 <-> PCLK2)
Bus Bridge (32bit <-> 16bit)
16bit Output compare (6ch)
Async Bus Bridge (PCLK1 <-> PCLK2)
Low voltage detection
（
Internal power supply low voltage detection）
RSTX
NMIX
MD0,MD1,P006
RX,TX
D,A,
ASX,CS,
RDX,
WRX,
SYSCLK
FRCK
ICU
OCU
TIOA,TIOB
AIN,BIN,ZIN
TIN,TOT
DAO
MONCLK
WOT
INT
TRG,PPG
SOUT,
SIN,
SCK
ADTG,AIN
OCU
ICU
FRCK
DTTI,RTO
APB
bus resource
RB
bus resource
The part enclosed with each color frame
shows the bus diagnosis target area.
AHB bus resource
MB91520 Series
MN705-00010-1v0-E
2099