M30245FCGP#U1 Renesas Electronics America, M30245FCGP#U1 Datasheet - Page 82

• Manufacturer Part Number: M30245FCGP#U1
• Description: IC M16C/24 MCU FLSH 128K 100LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/20r

Specifications of M30245FCGP#U1

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, SSI, UART/USART, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 82
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 100-LQFP
• Package: 100LQFP
• Family Name: R8C
• Maximum Speed: 16 MHz
• Operating Supply Voltage: 3.3 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 82
• Interface Type: USB/UART/I2C/SPI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

M30245 Group
Figure 1.44. USB Attach/Detach register (USBAD)
Rev.2.00
REJ03B0005-0200
USB Special Function Registers
USB Attach/Detach Register
The MCU controls USB operation through the use of special function registers. Some USB-related special function
registers have a mix of read/write, read only, and write only register bits. Additionally, the bits may be configured to
allow the user to write only "0" or "1" to individual bits.
• When accessing these registers, writing "0" to a register that can only be set to "1" by the CPU has no effect on that
register bit.
• Writing "1" to a register that can only be set to "0" by the CPU has no effect on that register bit.
All USB SFRs, with the exceptions of Endpoint FIFO data registers, USBAD, and USBC can be accessed by word or
by byte at an even or odd address. Endpoint FIFO Data Registers can be accessed by either word or by byte at even
addresses only.
The contents of all USB Special Functions Registers, including USB Attach/Detach and USB Control, are preserved
after a software reset.
The USB Attach / Detach Register is shown in Figure 1.44. The register is used to attach and detach the USB
function from a USB host without physically disconnecting the USB cable. This functionality is enabled by setting
P9
The port driver is tri-stated and a "1" is always read from the port bit in this mode. When the ATTACH/DETACH bit is a
"1" (and P9
detect an attach. When the ATTACH/DETACH bit is a "0" (and P9
be pulled down (through the cable and 15k ohm resistor on the host/hub side) and a detach to be registered by the
host. A 1.5k ohm pull-up resistor must be connected externally from P9
it is not used, the 1.5k ohm resistor should be placed between UVcc and D+.
See "Vbus Detect" for information on the vbus detect enable bit.
USB Attach/Detach Register
b7 b6 b5 b4 b3 b2 b1 b0
0
_SECOND to a "1". Doing this forces P9
0 0 0 0 0
Oct 16, 2006
0
_SECOND is a "1"), P9
page 80 of 264
Bit symbol
P9
Reserved
VBDT
Attach/
Detach
0-
Symbol
USBAD
second
0
Attach/Detach
Port 9
Vbus detect enable
is driven with the voltage on UVcc, causing D+ to be pulled up and the host to
0
-Second
0
to operate as a pull-up for D+ (through an external 1.5k ohm resistor).
Bit name
0 : Normal mode for Port 9
1 : Forces Port 9
Address
0 : Tri-states, P9
1 : Drives P9
001F 16
0 : Disabled
1 : Enabled
Must always be set to "0"
to detect an attach
0
_SECOND is a "1"), P9
0
0
with voltage on UVcc, causing the host
0
0
to D+ when this functionality is used. When
causing the host to detect a detach
to operate as pull up for D+.
Function
When reset
00 16
0
0
is tri-stated, causing D+ to
Universal Serial Bus
R
W