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Chapter 3
3.1.1 Description
Figure 3-1
Table 3-1
136
The figure below shows a block diagram of the microcontroller, focusing on the
CPU and modules that interact with the CPU directly. Table 3-1 lists the bus
types.
RCU interface
Instruction queue
V
F
B
Program counter
General-purpose
registers
System registers
V
D
B
Interrupt control unit
(INTC)
Standby control unit
(STBC)
CPU system
The shaded busses are used for accessing the configuration registers of the
concerned modules.
Bus types
Bus type
NPB – Peripheral bus
VSB – System bus
VFB – Fetch bus
VDB – Data bus
User's Manual U18743EE1V2UM00
CPU
Multiplier
(16 x 16 ? 32)
Barrel
shifter
ALU
NPB
Function
Bus interface to the peripherals (internal bus).
Bus interface to the Memory Controller for access to the
NPB bus bridge BBR.
Interface to the internal ROM (mask ROM or code flash).
Interface to the internal RAM.
CPU System Functions
System controller
Bus control unit
(BCU)
V
S
B
Bus bridge
(BBR)
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