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參數(shù)資料
| 型號(hào)： | M37643M8-XXXHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80 |
| 文件頁數(shù)： | 70/120頁 |
| 文件大小： | 1253K |
| 代理商： | M37643M8-XXXHP |
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53
7643 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to
change.
[USB Endpoint x (x = 0 to 2) IN Max. Packet Size Register]
IN_MAXP
This register specifies the maximum packet size (MAXP) of an
endpoint x IN packet. The value set for endpoint 1 is the number
of transmitted bytes divided by 8, and the value set for endpoints
0 and 2 is the actual number of transmitted bytes. The CPU can
change these values using the SET_DESCRIPTOR command.
The initial value for endpoints 0 and 2 is 8, and the initial value for
endpoint 1 is 1.
[USB Endpoint x (x = 0 to 2) OUT Max. Packet Size Register]
OUT_MAXP
This register specifies the maximum packet size (MAXP) of an
Endpoint x OUT packet. The value set for endpoint 1 is the num-
ber of received bytes divided by 8, and the value set for endpoints
0 and 2 is the actual number of received bytes. The CPU can
change these values using the SET_DESCRIPTOR command.
The initial value for endpoints 0 and 2 is 8, and the initial value for
endpoint 1 is 1. When using the endpoint 0, both USB endpoint x
IN max. packet size register (IN _MAXP) and USB endpoint x
OUT max. packet size register (OUT_MAXP) are set to the same
value. Changing one register’s value effectively changes the value
of the other register as well.
s Notes
Only flash memory version acknowledges IN/OUT token input to
the endpoints 3 and 4. For its countermeasure program the follow-
ing in the initial settings or other routines.
[USBINDEX] = 03h
; USBINDEX=58H
[IN_MAXP]=00h
; IN_MAXP=5BH
[OUT_MAXP]=00h
; OUT_MAXP=5CH
[USBINDEX]=04h
; USBINDEX=58H
[IN_MAXP]=00h
; IN_MAXP=5BH
[OUT_MAXP]=00h
; OUT_MAXP=5CH
(This program does not affect the operation of mask ROM ver-
sion.)
The maximum packet size (MAXP) of endpoint x IN is contained.
MAXP = n for endpoints 0, 2
MAXP = n 8 for endpoint 1
“n” is a written value into this register.
USB endpoint x IN max. packet size register (address 005B16)
IN_MAXP
b0
b7
The maximum packet size (MAXP) of endpoint x OUT is contained.
MAXP = n for endpoints 0, 2
MAXP = n 8 for endpoint 1
“n” is a written value into this register.
USB endpoint x OUT max. packet size register (address 005C16)
OUT_MAXP
b0
b7
Fig. 46 Structure of USB endpoint x IN max. packet size register
Fig. 47 Structure of USB endpoint x OUT max. packet size register
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