参数资料
型号: M34519M8-XXXFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42
封装: 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42
文件页数: 110/138页
文件大小: 1146K
代理商: M34519M8-XXXFP
4519 Group
Rev.3.01
2005.06.15
page 71 of 160
REJ03B0007-0301
ROM ORDERING METHOD
1.Mask ROM Order Confirmation Form
2.Mark Specification Form
3.Data to be written to ROM .................................. one floppy disk.
For the mask ROM confirmation and the mark specifications,
refer to the “Renesas Technology Corp.” Homepage
(http://www.renesas.com/en/rom).
(7) Clock control register MR
Register MR controls system clock. Set the contents of this register
through register A with the TMRA instruction. In addition, the TAMR
instruction can be used to transfer the contents of register MR to
register A.
Table 22 Clock control registers
Note: “R” represents read enabled, and “W” represents write enabled.
MR3
Clock control register MR
Operation mode
Through mode (frequency not divided)
Frequency divided by 2 mode
Frequency divided by 4 mode
Frequency divided by 8 mode
Main clock (f(XIN)) oscillation enabled
Main clock (f(XIN)) oscillation stop
Main clock (f(XIN))
Main clock (f(RING))
at reset : 11112
at RAM back-up : 11112
MR3
0
1
R/W
TAMR/
TMRA
Main clock f(XIN) oscillation circuit control bit
System clock oscillation source selection bit
Operation mode selection bits
0
1
0
1
MR2
0
1
0
1
MR1
MR0
MR2
0
1
On-chip oscillator (f(RING)) oscillation enabled
On-chip oscillator (f(RING)) oscillation stop
On-chip oscillator (f(RING)) control bit
Clock control register RG
W
TRGA
at RAM back-up : 02
at reset : 02
RG0
(8) Clock control register RG
Register RG controls start/stop of on-chip oscillator. Set the con-
tents of this register through register A with the TRGA instruction.
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