Clock, Reset, and Power Control (CRP)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
5-28
Freescale Semiconductor
Preliminary
Figure 5-18. Sleep Mode Debug Block Integration
5.4
Real-Time Counter (RTC)
The RTC is a free-running counter used for time-keeping applications. The RTC may be configured to
generate an interrupt at a pre-defined interval independent of the mode of operation (run, stop, and sleep).
If in a low-power stop or sleep mode when the RTC interval is reached, the RTC will first generate a
wakeup and then assert the interrupt request.
The RTC also supports an autonomous periodic interrupt function used to generate a periodic wakeup
request to exit a low-power sleep mode or an interrupt request.
5.4.1
RTC Features
Features of the RTC include:
•
32-bit counter
•
Selectable counter clock sources
16MIRC
Z0 Core
Z1 Core
CRP
NPC
TCK
tck
tclk
sleep reset
debug req
debug req
debug enable
debug enable
16m irc
npc_lp_dbg
nexus port enables
Pad Keepers
Remaining Nexus & JTAG Pins
nexus pad control
pad keeper
TDO
control
tool handshake
tdo
FSM
tdo