SMSC Debugger Toolset Overview
By Jesse Chang
Version 1.5
Introduction

The Pegasus debugger Toolset provides a full set of integrated tools
helpful to PC keyboard controller hardware and firmware
development during the design phase.

A fully configured design will support a USB2.0 based high speed
serial flash programmer, a USB2.0 based trace debugger, a UART
based ROM monitor, and a UART based serial flash programmer.
Page 2
smsc confidential
Pegasus Mechanical Description
PEGASUS PCB OVERVIEW
Page 3
smsc confidential
Connection to KBC/EC 1100 EVB via target
connector
Page 4
smsc confidential
System Development SMSC KBC/EC 1100
Environment (Pegasus Toolkit)
Page 5
smsc confidential
KBC1100 INTERFACE FOR FIRMWARE
DEVELOPMENT
PIN NAME
DESCRIPTON
1.
GPIO20 / 8051RX
8051-Driven 16550 UART Receive Pin
2.
GPIO21 / 8051TX
8051-Driven 16550 UART Transmit Pin
3.
LGPIO77 /
1.8432MHz_IN
8051-Driven 16550 UART External Baud Clock
Input
4.
GPIO73/MSCLK
MCU Serial Debug Port Clock Pin
5.
GPIO74/MSDATA
MCU Serial Debug Port Data Pin
6.
GPIO39/TF_RESET
Trace FIFO Reset Pin
7.
Vcc
8.
GND
Page 6
smsc confidential
PEGASUS TARGET CONNECTOR AND SIGNAL
1
3
5
7
9
11
13
tex
t
text
text
text
text
text
text
text
text
text
text
text
text
text
text
2
4
6
8
10
12
14
1
3
2
4
5
7
9
11
6
8
10
12
13
text
Pin
Signal
Pin
Signal
1
8051_TX
2
Vcc(5/3.3)
3
8051_RX
4
Vcc(5/3.3)
5
FIFO_FULL
6
GND
7
TF_RESET/
CSSRT0_nCTSnR
TS_nSS
8
OPEN for
1.8432MHz_in
9
MSDATA/CSS
RT0_SCLK
10
GND
11
MSCLK/CSSR
T0_TX_RX
12
GND
13
1.8432MHz
14
GND
14
2 x 7 Shrouded Male Header
0.025" Sq Posts, 0.100" on Center
Page 7
smsc confidential
USB-TO-TARGET CONNECTOR CONFIGURATION

The SMSC Debug Trace environment was designed for the purpose of easing
BIOS development, firmware development, and system debug. The trace
method developed by SMSC is non-intrusive, minimizing the debugging tool’s
impact on actual code implementation. Data is written to either the FLASH
Memory bus or the SMSC Serial Debug Port (for targets that have one) in a very
low overhead format. The extra XDATA space writes (0x7FBA) make only
marginal differences in code execution speed. Furthermore, this method allows
debug data to be gathered without activation of any normally unused chip
hardware, such as the serial port, making it more closely emulate the actual
firmware implementation.

Firmware coding for Pegasus board initialization
rMultiplx_12_95_88 = 0x08;
// MMCR 0x7f65 rMultiplx_12_95_88 == 0x08 for TFIFO INIT.
rGPIO_N_DIR_45_38 |= 0x02; // Set 0x7FCC bit 1, which sets GPIO39's direction as output.
// the default output is low (0).
rGPIO_N_OUT_45_38 |= 0x02; // Set 0x7FCD bit 1, which sets GPIO39 output as Hi to release
// Pegasus's reset signal.
Page 8
smsc confidential
SMSC Debug Trace acquisizer


Either Windows 2000 or Windows XP operation system is required.
There is no installation program. Just copy USB_DFT.exe to a working
directory and execute it after trace FIFO board is connected.
Page 9
smsc confidential
UART CONFIGURATION

Serial FLASH Programmer
The SMSC Serial Flash Programming Interface is used as a
remedial measure for Flash crisis recovery. When the VCC1 supply
is asserted, the SFPI_EN strap option can enable the Serial Flash
Programming Interface. An external 1.8432MHz clock must be
provided using the 1.8432MHZ_IN pin, which is an alternate function
of the LGPIO77 pin. When the Serial Flash Programming Interface is
enabled, the 8051 executes bootstrap code from a small internal
ROM that allows the 8051 to send and receive data using the 8051Driven 16550 UART to download firmware to the 8051 Scratch
Memory. This firmware can be used to reprogram the Flash.
This feature of this configuration is intended for use with the SMSC
Serial FLASH Programming Utility.
Page 10
smsc confidential
Serial FLASH Programming Utility
Using the Serial Flash Programming Interface an SMSC KBC
device’s 8051 can execute bootstrap code from a small internal
ROM. That code allows the 8051 to send and receive data using its
16550 UART to download firmware to Scratch Memory.
 Also provides a compact set of debug capabilities.

Page 11
smsc confidential
Serial FLASH Programming Utility Installation



Boot the Host PC to Windows 2000 or Windows XP.
Execute the SFPU installation program setup.exe.
Follow the on screen instructions.
Page 12
smsc confidential
GUI of Serial FLASH Programming Utility
(Flash Update)
Page 13
smsc confidential
GUI of Serial FLASH Programming Utility
(Debugger : Read From Scratch ROM )
Page 14
smsc confidential
GUI of Serial FLASH Programming Utility
(Debugger : Write Internal Memory )
Page 15
smsc confidential
Connection to Pegasus companion
KBC/EC 1100 EVB Via UART
Directly Without Pegasus
ROM EMULATOR
CONNECTION
RS232 NULL MODEM
(Pin 2 (Tx) and Pin 3 (Rv) are connected crosswise)
Page 16
smsc confidential
KBC1100 EVB UNIROM HEADER PIN-OUTS
FOR ROM EMULATOR
A ROM emulator usually connects to the target board using a ribbon cable. One end of the ribbon cable
has a DIP connector that plugs into a FLASH memory socket and the other end has an IDS connector
that plugs into the ROM emulator. If your ROM emulator connector has one of the following IDS pinouts, then it can be used with the KBC1100 EVB.
Note: The EconoROMIII and UniROM from TechTools have a IDS pin-out A connector
Page 17
smsc confidential
REWORK FOR CONNECTING WITH LEAP
ROM EMULATOR
Page 18
smsc confidential
Terminal Display of KBC/EC 1100 Demo program
(UART connecting directly)
Page 19
smsc confidential
THE END