RX610 Group
3. Operating Modes
R01UH0032EJ0120 Rev.1.20
Page 93 of 1006
Feb 20, 2013
3.2.4
System Control Register 1 (SYSCR1)
Address: 0008 0008h
b15
b14
b13
b12
b11
b10
b9
b8
Value after reset:
0
0
0
0
0
0
0
0
—
—
—
—
—
—
—
—
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
1
—
—
—
—
—
—
—
RAME
Bit
Symbol
Bit Name
Description
R/W
b0
RAME
RAM Enable
0: The on-chip RAM is disabled
1: The on-chip RAM is enabled
R/W
b15 to
b1
Reserved
These bits are always read as 0. The write value should
always be 0.
R/W
SYSCR1 is used to enable or disable the on-chip RAM.
RAME Bit (RAM Enable)
The RAME bit enables or disables the on-chip RAM.
The RAME bit is initialized to 1 after a reset is released.
A 0 should not be written to this bit during access to the on-chip RAM.
When accessing the on-chip RAM immediately after changing the RAME bit from 0 (on-chip RAM disabled) to 1
(on-chip RAM enabled), always make sure that the RAME bit is 1 before the access.
Even when the RAME bit is cleared to 0, the on-chip RAM retains its value*.
To retain the value in the on-chip RAM, keep the specified RAM standby voltage (VRAM). For details, see section 29,
Electrical Characteristics.
Summary of Contents for RX600 Series
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