m66291 Renesas Electronics Corporation., m66291 Datasheet - Page 8

• Manufacturer Part Number: m66291
• Description: Assp Usb2.0 Device Controller
• Manufacturer: Renesas Electronics Corporation.

M 6 6 2 9 1 G P / H P
R e v 1 . 0 1
DMA
interface
USB
interface
Others
Item
A pin preceded by an asterisk "*" is an active low pin.
(Example: *CS pin is an active low, CS)
Note 1: The polarities of *Dreq, *Dack, *INT, and *SOF pins can be changed by the internal registers.
Note 2: The Xin, Xout, Vbus, D+ and D- pins are all driven by CoreVcc.
Note 3: The pins for bus interface, interrupt, DMA control, reset and test are all driven by IOVcc. See
2 0 0 4 . 1 1 . 0 1
*Dack1
(
*TC1
D+
D-
Vbus
TrON
*RST
Xin
Xout
TEST
CoreVcc
(
IOVcc
(
GND
Note1
Note
Note 3
Pin Name
2)
)
)
p a g e 8 o f 1 2 2
Input
Input
Input/
Output
Input/
Output
Input
Output
Input
Input
Output
Input
⎯
⎯
⎯
Output
Input/
DMA Acknowledge 1
This pin enables access of FIFO by DMA transfer for DMA channel 1.
Terminal Count 1
This pin indicates the final transfer cycle at “L” level for DMA channel 1.
This is valid only in write cycle. Set to “H” level when not used.
USB Data (+)
D+ of USB. Connect an external resistance in series.
USB Data (-)
D- of USB. Connect an external resistance in series.
Vbus Input (with built-in pulldown resistance)
Connect to the Vbus of USB bus or to the 5V power supply.
Connection or shutdown of the Vbus can be detected.
TrON Output
This pin is connected to the D+ pullup resistance of 1.5 KΩ.
This pin is used to control ON/OFF of the pullup resistance.
Reset
This pin is used to initialize the values of the internal register or the counter at
"L" level.
Oscillator
Input
Oscillator
Output
TEST Input (with built-in pulldown resistance)
This pin is input for the test. Set to "L" level or keep open.
Core Power Supply
These pins are used as the power source for internal logic, FIFO memory, PLL
circuit, USB transceiver and oscillation buffer.
I/O Power Supply
Ground
These pins are used to input/output the signals of internal clock
oscillation circuits. Connect a crystal unit between Xin and Xout
pins.
If an external clock signal is used, connect it to the Xin pin and
leave the Xout pin open.
Function
Figure 1.2
.
1
1
1
1
1
1
1
1
1
1
2
2
3
Count
Pin