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Chapter 3
CPU Function
Preliminary User’s Manual U14913EE1V0UM00
3.3 Operation
Modes
3.3.1 Operation
modes
The V850E/CA1 / ATOMIC has the following operations modes. Mode specification is carried out by the
MODE0 to MODE3 pins.
(1)
Normal operation mode
(a) Single-chip mode
Access to the internal ROM is enabled.
In single-chip mode 0, after system reset is cleared, each pin related to the bus interface enters the
port mode, program execution branches to the reset entry address of the internal ROM, and instruc-
tion processing starts. By setting the PMCAL, PMCAH, PMCDL, PMCCS, PMCCT, and PMCCM
registers to control mode by instruction, an external device can be connected to the external mem-
ory area.
The initial value of the register differs depending on the mode.
Table 3-3: Register Initial Values by Operation Modes
(2)
Flash memory programming mode (µPD70F3123 only)
If this mode is specified, it becomes possible for the flash programmer to run a program to the inter-
nal flash memory.
Operation Mode
PMCAL PMCAH PMCDL PMCCS PMCCT PMCCM
BSC
Normal
operation
mode
Single-chip mode
0000H
0000H
0000H
00H
00H
00H
5555H
Содержание V850E/CA1 ATOMIC
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