M3087BFLBGP#U5 Renesas Electronics America, M3087BFLBGP#U5 Datasheet - Page 79

• Manufacturer Part Number: M3087BFLBGP#U5
• Description: IC M32C/87 MCU FLASH 144LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M32C/80r

Specifications of M3087BFLBGP#U5

• 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: 1MB (1M 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: -20°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: -

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ09B0180-0151 Rev.1.51 Jul 31, 2008
Page 55 of 587
6.1
Figure 6.5
The hardware reset 2 is performed if the voltage applied to the VCC1 pin drops to Vdet3 (V) or below.
Set the VC26 bit in the VCR2 register to 1 to use this Vdet3 detection function.
When the hardware reset 2 occurs, ports and I/O pins for peripheral functions are reset. The CPU and SFRs are
reset when td(S-R) elapses after the voltage applied to the VCC1 pin reaches Vdet3r (V) or above. Then, the MCU
executes a program in an address indicated by the reset vector. The states of pins and SFRs after reset are the same
as the hardware reset 1.
Use the Vdet3 detection function while operating at or above Vdet3s. If the applied voltage drops below Vdet3s,
perform the hardware reset 1 (refer to 5.1.2 Power-on Reset). The Vdet3 detection function cannot be used while
the MCU is in stop mode.
Figure 6.5 shows a Vdet3 detection function operation example.
VCC1
RESET
VC26 bit in the
VCR2 register
Internal reset signal
NOTES:
Vdet3 Detection Function
1. Typical value.
2. Minimum value.
Vdet3 Detection Function Operation Example
Vdet3s
Vdet3r
2.0V
Vdet3
VSS
“H”
(2)
“H”
“L”
“L”
1
0
Undefined
5.0 V
Set to 1 (Vdet3 detection function used) by a program
6. Power Supply Voltage Detection Function
3.0 V
(1)
3.1 V
Wait time to release
hardware reset 2: td(S-R)
(1)
5.0 V