C8051T622-GMR Silicon Labs, C8051T622-GMR Datasheet - Page 53
![no-image](/images/no-image-200.jpg)
C8051T622-GMR
Manufacturer Part Number
C8051T622-GMR
Description
8-bit Microcontrollers - MCU USB-OTP-16K-QFN24
Manufacturer
Silicon Labs
Datasheet
1.C8051T622-GMR.pdf
(254 pages)
Specifications of C8051T622-GMR
Rohs
yes
Core
8051
Data Bus Width
8 bit
Processor Series
C8051
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051T622-GMR
Manufacturer:
SILICON
Quantity:
5 000
- Current page: 53 of 254
- Download datasheet (2Mb)
a linear memory fill, as the address pointer doesn't have to be reset when reaching the RAM block bound-
ary.
SFR Definition 10.1. EMI0CN: External Memory Interface Control
SFR Address = 0xAA
10.2.3. Accessing USB FIFO Space
The C8051T622/3 and C8051T326/7 include 256 bytes of RAM which functions as USB FIFO space.
Figure 10.3 shows an expanded view of the FIFO space and user XRAM. FIFO space is normally
accessed via USB FIFO registers; see Section “18.5. FIFO Management” on page 124 for more informa-
tion on accessing these FIFOs. The MOVX instruction should not be used to load or modify USB data in
the FIFO space.
Unused areas of the USB FIFO space may be used as general purpose XRAM if necessary. The FIFO
block operates on the USB clock domain; thus the USB clock must be active when accessing FIFO space.
Note that the number of SYSCLK cycles required by the MOVX instruction is increased when accessing
USB FIFO space.
To access the FIFO RAM directly using MOVX instructions, the following conditions must be met: (1) the
USBFAE bit in register EMI0CF must be set to '1', and (2) the USB clock frequency must be greater than or
equal to twice the SYSCLK (USBCLK > 2 x SYSCLK). When this bit is set, the USB FIFO space is mapped
into XRAM space at addresses 0x0400 to 0x04FF. The normal on-chip XRAM at the same addresses can-
not be accessed when the USBFAE bit is set to 1.
Important Note: The USB clock must be active when accessing FIFO space.
Name
Reset
Bit
7:3
2:0 PGSEL[2:0] XRAM Page Select.
Type
Bit
UNUSED
Name
R
7
0
Unused. Read = 00000b; Write = Don’t Care
The EMI0CN register provides the high byte of the 16-bit external data memory
address when using an 8-bit MOVX command, effectively selecting a 256-byte page
of RAM. Since the upper (unused) bits of the register are always zero, the PGSEL
determines which page of XRAM is accessed.
For Example: If EMI0CN = 0x01, addresses 0x0100 through 0x01FF will be
accessed.
R
6
0
R
5
0
C8051T622/3 and C8051T326/7
Rev. 1.1
R
4
0
Function
R
3
0
R/W
2
0
PGSEL[2:0]
R/W
1
0
R/W
0
0
53
Related parts for C8051T622-GMR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![CP2102EK](/photos/9/3/90395/cp2102ek_tmb.jpg)
Part Number:
Description:
KIT EVALUATION FOR CP2102
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![CP2103EK](/photos/9/6/90669/cp2103ek_tmb.jpg)
Part Number:
Description:
KIT EVAL FOR CP2103 USB TO UART
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![CP2201EK](/photos/9/9/90977/cp2201ek_tmb.jpg)
Part Number:
Description:
KIT EVAL FOR CP2201 ETH CTRLR
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![CAPTOUCHSENSEDC](/photos/9/20/92001/captouchsensedc_tmb.jpg)
Part Number:
Description:
DAUGHTER CARD CAP TOUCH SENSE
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![CAPTOUCHSENSESK](/photos/9/20/92002/captouchsensesk_tmb.jpg)
Part Number:
Description:
KIT STARTER CAP TOUCH SENSE
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F320DK](/photos/9/20/92068/c8051f320dk_tmb.jpg)
Part Number:
Description:
DEV KIT FOR C8051F320/F321
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F120DK](/photos/9/20/92070/c8051f120dk_tmb.jpg)
Part Number:
Description:
DEVKIT-F120/21/22/23/24/25/26/27
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F310DK](/photos/9/23/92300/c8051f310dk_tmb.jpg)
Part Number:
Description:
DEV KIT FOR C8051F310/F311
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F226DK](/photos/9/23/92302/c8051f226dk_tmb.jpg)
Part Number:
Description:
DEV KIT F220/221/226/230/231/236
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F300DK](/photos/9/23/92305/c8051f300dk_tmb.jpg)
Part Number:
Description:
DEV KIT F300/301/302/303/304/305
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F330DK](/photos/9/23/92306/c8051f330dk_tmb.jpg)
Part Number:
Description:
DEV KIT FOR C8051F330/F331
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F005DK](/photos/9/23/92307/c8051f005dk_tmb.jpg)
Part Number:
Description:
DEV KIT FOR F005/006/007
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F020DK](/photos/9/23/92314/c8051f020dk_tmb.jpg)
Part Number:
Description:
DEV KIT FOR F020/F021/F022/F023
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F340DK](/photos/9/23/92323/c8051f340dk_tmb.jpg)
Part Number:
Description:
KIT DEV FOR C8051F34X
Manufacturer:
Silicon Laboratories Inc
Datasheet:
![C8051F410DK](/photos/9/23/92324/c8051f410dk_tmb.jpg)
Part Number:
Description:
KIT DEV FOR C8051F41X
Manufacturer:
Silicon Laboratories Inc
Datasheet: