User Guide

PAMS
Technical Documentation
NSE–8/9
System Module
Page 2– 55
Issue 1 07/99
– AccIF(Accessory Interface)
– SCU (Synthesizer Control Unit for controlling 2 separate synthe-
sizer)
– UIF (Keyboard interface, serial control interface for COBBA_GJP
PCM Codec, LCD Driver and CCONT)
– UIF+ (roller/ slide handling)
– SIMI (SimCard interface with enhanced features)
– PUP (Parallel IO, USART)
– FLEXPOOL (DAS00308 FlexPool Specification)
– SERRFI (DAS00348 COBBA_GJP Specifications)
MAD Power Up Procedures
Because MAD2PR1 includes three functional units it is beneficial to
describe also the MAD2PR1 internal power up behavior. It can be divided
into two parts:
1. normal power up.
2. FLASH down loading power up
MAD2PR1 Normal Power Up
0. INITIAL CONDITIONS: POWER UP RESET (PURX) IS ACTIVE
– MAD2PR1 is in RESET mode
– FLASH prommer not connected
1. POWER UP RESET (PURX) RELEASED:
1.1 MAD2PR1 releases the MCU reset (MCUResetX) and the external
system reset (ExtSysReset)
2. MCU BOOTS UP FROM SYSTEM LOGIC BOOT ROM:
2.1 MCU starts to read the boot code from system logic boot ROM
2.2 MCU checks if the FLASH prommer is connected (by studying the
status of serial synchronous clock input at MBUS line)
2.3 If prommer not connected (MBUS not LOW) then continue this
procedure,else go to MAD FLASH down loading power up procedure
2.4 MCU reads the system configuration data from FLASH memory
2.5 If system configuration data OK then continue this procedure,else
jump to 4 (system configuration data not ok).
2.6 MCU disables boot ROM and switches to read code from FLASH
memory
3. MAD2PR1 NORMAL POWER UP DONE AND MCU CONTINUES
INITIALIZATION FROM FLASH MEMORY:
4. SYSTEM CONFIGURATION DATA NOT OK:
4.1 MCU aborts all program execution and drives the FBUS–TX line low
(to indicate unsuccessful booting)
4.2 CCONT watchdog expires and the phone is turned off