C8051T322-GQR Silicon Labs, C8051T322-GQR Datasheet - Page 282

• Manufacturer Part Number: C8051T322-GQR
• Description: 8-bit Microcontrollers - MCU USB-OTP-16K-LQFP32
• Manufacturer: Silicon Labs

Specifications of C8051T322-GQR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

C8051T620/621/320/321/322/323
30. C2 Interface
C8051T620/621/320/321/322/323 devices include an on-chip Silicon Labs 2-Wire (C2) debug interface to
allow EPROM programming and in-system debugging with the production part installed in the end applica-
tion. The C2 interface operates using only two pins: a bi-directional data signal (C2D), and a clock input
(C2CK). See the C2 Interface Specification for details on the C2 protocol.
30.1. C2 Interface Registers
The following describes the C2 registers necessary to perform EPROM programming functions through the
C2 interface. All C2 registers are accessed through the C2 interface as described in the C2 Interface Spec-
ification.
C2 Register Definition 30.1. C2ADD: C2 Address
282
Name
Reset
7:0 C2ADD[7:0] Write: C2 Address.
Bit
Type
Bit
Name
7
0
Selects the target Data register for C2 Data Read and Data Write commands accord-
ing to the following list.
Address
0x00
0x01
0x02
0xDF
0xBF
0xB7
0xAF
0xAE
0xA9
0xAA
0xAB
0xAC
Read: C2 Status
Returns status information on the current programming operation.
When the MSB (bit 7) is set to 1, a read or write operation is in progress. All other bits
can be ignored by the programming tools.
6
0
Name
DEVICEID Selects the Device ID Register (read only)
REVID
DEVCTL
EPCTL
EPDAT
EPSTAT
EPADDRH Selects the C2 EPROM Address High Byte Register
EPADDRL Selects the C2 EPROM Address Low Byte Register
CRC0
CRC1
CRC2
CRC3
5
0
Description
Selects the Revision ID Register (read only)
Selects the C2 Device Control Register
Selects the C2 EPROM Programming Control Register
Selects the C2 EPROM Data Register
Selects the C2 EPROM Status Register
Selects the CRC0 Register
Selects the CRC1 Register
Selects the CRC2 Register
Selects the CRC3 Register
Rev. 1.1
4
0
C2ADD[7:0]
R/W
Function
3
0
2
0
1
0
0
0