MC68HC16Z1CPV16 Datasheet, PDF (129/500 Pages) Freescale Semiconductor, Inc – Symbols and Operators, CPU16 Register Mnemonics

Freescale Semiconductor, Inc.
SET UP INTERRUPT
TO WAKE UP MCU
FROM LPSTOP
NO
LEAVE IMBCLK¹
ON IN LPSTOP?
YES
SET STOP BITS FOR
MODULES THAT WILL
NOT BE ACTIVE IN
LPSTOP
SET STCPU² = 1
f_imbclk = f_sys
IN LPSTOP
SET STCPU² = 0
f_imbclk = 0 Hz
IN LPSTOP
NO
USING
EXTERNAL CLOCK?
YES
NO
USE SYSTEM CLOCK
AS SIMCLK IN LPSTOP?
YES
SET STSIM = 1
f_simclk3 = f_sys
IN LPSTOP
SET STSIM = 0
f_simclk3 = f_ref
IN LPSTOP
NO
WANT CLKOUT
ON IN LPSTOP?
YES
SET STEXT = 1
f_clkout4 = f_sys
f_eclk = ÷ f_sys
IN LPSTOP
SET STEXT = 0
f_clkout4 = 0 Hz
f_eclk = ÷ 0 Hz
IN LPSTOP
NO
WANT CLKOUT
ON IN LPSTOP?
YES
SET STEXT = 1
f_clkout4 = f_ref
f_eclk = ÷ 0 Hz
IN LPSTOP
SET STEXT = 0
f_clkout4 = 0 Hz
f_eclk = ÷ 0 Hz
IN LPSTOP
ENTER LPSTOP
NOTES:
1. IMBCLK IS THE CLOCK USED BY THE CPU16L, SIML, ADC, MCCI, AND THE GPT.
2. WHEN STCPU = 1, THE CPU16L IS SHUT DOWN IN LPSTOP. ALL OTHER MODULES WILL REMAIN ACTIVE UNLESS
THE STOP BITS IN THEIR MODULE CONFIGURATION REGISTERS ARE SET PRIOR TO ENTERING LPSTOP.
3. THE SIMCLK IS USED BY THE PIT, IRQ, AND INPUT BLOCKS OF THE SIML.
4. CLKOUT CONTROL DURING LPSTOP IS OVERRIDDEN BY THE EXOFF BIT IN SIMCR. IF EXOFF = 1, THE CLKOUT
PIN IS ALWAYS IN A HIGH-IMPEDANCE STATE AND STEXT HAS NO EFFECT IN LPSTOP. IF EXOFF = 0, CLKOUT
IS CONTROLLED BY STEXT IN LPSTOP. WHEN STCPU = 1, THE CPU16L IS DISABLED IN LPSTOP, BUT ALL OTHER
MODULES REMAIN ACTIVE OR STOPPED ACCORDING TO THE SETTING.
SIML LPSTOP FLOWCHART
Figure 5-7 SIML LPSTOP Flowchart
M68HC16 Z SERIES
USER’S MANUAL
SYSTEM INTEGRATION MODULE
For More Information On This Product,
Go to: www.freescale.com
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