Signal Description
MOTOROLA
System Integration Module (SIM)
4-5
Preliminary
4
Table 4-2. Clock Generator Inputs/Outputs
Name
Type
Clock Domain
Function
CLK_SYS_DRAM
Output
CLK_MSTR
System clock to data RAM with hold off support
CLK_SYS_IPBB
Output
CLK_MSTR
System clock to IPBus Bridge with hold off support
CLK_SYS_CPUCLK
Output
CLK_MSTR
System clock to DSP56800E Core with hold off support
CLK_CPU_PCLK
Output
CLK_MSTR
Feeds PCLK input on DSP56800E Core
CLK_CPU_NCLK
Output
CLK_MSTR
Feeds NCLK input on DSP56800E Core
CLK_CPU_WCLK
Output
CLK_MSTR
Feeds WRAP_CLK input on DSP56800E Core
CLK_SYS_GENRI
Output
CLK_MSTR
General purpose system clock with hold off support
CLK_SYS_GENRI_INV
Output
CLK_MSTR
General purpose system clock with hold off support-inverted
CLK_SYS_CONT
Output
CLK_MSTR
Continuous system clock (feeds back into SIM)
CLK_PER_CONT
Output
CLK_MSTR
Peripheral bus clock
CLK_PER_CONT_INV
Output
CLK_MSTR
Inverted peripheral bus clock
CLK_CLKOUT
Output
CLK_MSTR
Output to CLKOUT output pad
PCLK_PHASE
Output
CLK_MSTR
Indicates peripheral clock phase (1=address 0=data)
HOLD OFF
Output
CLK_MSTR
Indicates at least one hold off control is asserted,
used to abort peripheral bus transactions
C7WAITST
Output
CLK_MSTR
Indicates to core if it’s system clock is to be stalled for reasons
other than a core reset (e.g. a hold off or core_stall)
CLK_MSTR
Input
CLK_MSTR
Master input clock from CGM module
CLK_OSC
Input
—
Master clock direct from oscillator bypassing CGM module
CLK_SCAN
Input
—
Scan mode clock
HOLD_DRAM
Input
—
Hold off request from data RAM
HOLD_IPBB
Input
CLK_MSTR
Hold off request from IPBus bridge
N1CLKEN
Input
CLK_MSTR
NCLK enable signal from DSP56800E Core
JHAWKCORETAP_EN
Input
CLK_MSTR
Re synchronized to CLK_SYS_CONT and used to disable
CLK_CPU_PCLK after reset if core tap disabled
CORE_STALL
Input
—
Core stall request from SBC for DMA mastership
Table 4-3. Reset Generator Inputs/Outputs
Name
Type
Clock Domain
Function
RST_CORE
Output
CLK_SYS_CONT Synchronized and extended reset to DSP56800E Core
RST_PERIPH
Output
CLK_SYS_CONT Synchronized and extended reset to general peripheral logic
RST_TOD
Output
CLK_SYS_CONT
Synchronized and extended reset to modules using only power
on reset (the TOD and COP modules)
RST_CGM
Output
CLK_OSC
Synchronized and extended reset to CGM module
RST_PIN
Input
—
Reset request from external reset pin
RST_POR
Input
—
Reset request from power-on reset module
RST_COP
Input
—
Reset request from COP module