M3087BFKBGP#U3 Renesas Electronics America, M3087BFKBGP#U3 Datasheet - Page 109
M3087BFKBGP#U3
Manufacturer Part Number
M3087BFKBGP#U3
Description
IC M32C/87B MCU FLASH 144LQFP
Manufacturer
Renesas Electronics America
Series
M16C™ M32C/80r
Datasheet
1.M3087BFLGPU3.pdf
(629 pages)
Specifications of M3087BFKBGP#U3
Core Processor
M32C/80
Core Size
16/32-Bit
Speed
32MHz
Connectivity
EBI/EMI, I²C, IEBus, IrDA, SIO, UART/USART
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
121
Program Memory Size
768KB (768K x 8)
Program Memory Type
FLASH
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 34x10b, D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LQFP
For Use With
R0K330879S001BE - KIT DEV RSK M32C/87R0K330879S000BE - KIT DEV RSK M32C/87
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M3087BFKBGP#U3M3087BFKBGP#U5
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ09B0180-0151 Rev.1.51 Jul 31, 2008
Page 85 of 587
Figure 9.5
Oscillation Stop Detection Register
b7
0
b6 b5 b4
0
NOTES:
0
1. Set the CM2 register after the PRC0 bit in the PRCR register is set to 1 (write enable).
2. If the PM21 bit in the PM2 register is set to 1 (disables a clock change), a write to the CM20 bit has no effect.
3. When a loss of the main clock is detected while the CM20 bit is set to 1, the CM21 bit becomes 1.
4. When both the CM20 and CM23 bits are set to 1, do not set the CM21 bit to 0.
5. When a loss of the main clock is detected, the CM22 bit becomes 1. The CM22 bit can only be set to 0, not 1, by a program.
6. Determine the main clock state by reading the CM23 bit several times after the oscillation stop detection interrupt is generated.
Although the main clock restarts oscillating, the CM21 bit does not become 0. To use the main clock as the CPU clock source
If the CM22 bit is set to 0 by a program while the main clock is stopped, the CM22 bit does not become 1 until another loss of
after the main clock restarts oscillating, set the CM21 bit to 0 by a program.
the main clock is detected after the main clock restarts oscillating.
0
b3
b2
CM2 Register
b1
b0
Bit Symbol
(b7-b4)
CM20
CM21
CM22
CM23
Symbol
CM2
−
Oscillation stop detection
enable bit
CPU clock select bit 2
Oscillation stop detection flag
Main clock monitor flag
Reserved bits
(2)
Bit Name
(1)
(3, 4)
(6)
Address
000Dh
(5)
0: Oscillation stop detect function not used
1: Oscillation stop detect function used
0: Clock selected by the CM17 bit
1: On-chip oscillator clock
0: Loss of main clock not detected
1: Loss of main clock detected
0: Main clock oscillates
1: Main clock stops
Set to 0
Function
9. Clock Generation Circuits
After Reset
00h
RW
RW
RW
RW
RW
RO
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