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MCP16502 데이터시트(PDF) 21 Page - Microchip Technology

부품명 MCP16502
상세설명  High-Performance PMIC for SAMA5DX/SAM9X6/SAM9X7/SAMA7G Series MPUs
PDF  86 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP16502 데이터시트(HTML) 21 Page - Microchip Technology

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DS20006275D-page 21
MCP16502
4.3.4
PWRHLD, LPM, HPM AND POWER
STATES DEFINITIONS
PWRHLD, LPM and HPM define different power states
which are illustrated in Table 4-2. These are default
definitions for the targeted typical application scenario
of the SAMA5D2 MPU when powering LPDDR2 DDR
memories (MCP16502AC), and therefore, may be
different for other application configurations and product
variants.
The logic value of the HPM input pin is masked
(processed by the internal logic as ‘0’) until a specific
I2C command is issued (HPMEN bit must be set to ‘1’),
because HPM is a generic GPIO with a status at the
MPU power-up time that can be undefined.
After the software has issued the unmask HPM
command through I2C, it is safe to assume that the
HPM status is well defined and the HPM signal can be
used to enter and exit the High-Performance mode.
Other logic combinations of PWRHLD, LPM and HPM
(occurring after the HPM unmasking) are forbidden.
The initial state is the OFF state (shutdown).
The process by which the MCP16502 abandons the
OFF state and enters the other possible power states is
defined as the power-up sequence, which is described
in Section 4.4.1 “Typical Power-up Sequence and
Timing”. The following state diagram in Figure 4-2 illus-
trates the power states of MCP16502 and their typical
and/or permissible dynamic transitions.
TABLE 4-2:
DEFAULT POWER STATES DEFINITION (MCP16502AC)
PWRHLD LPM HPM
Buck1
Buck2
Buck3
Buck4
LDO1 LDO2 nRSTO
Power State
00
0
OFF
OFF
OFF
OFF
OFF
OFF
Low
OFF
01
0
OFF
ON
Auto-PFM
OFF
ON
Auto-PFM
OFF
OFF
Low
Hibernate mode
11
0
ON
Auto-PFM
ON
Auto-PFM
ON
Auto-PFM
ON
Auto-PFM
ON
OFF
High-Z Low-Power mode
10
0
ON
FPWM
ON
FPWM
ON
FPWM
ON
FPWM
ON
OFF
High-Z Active
10
1
ON
FPWM
ON
FPWM
ON
FPWM
ON
FPWM
ON
OFF
High-Z High-Performance
Active (only for
SAMA7G5, not used
by SAMA5D2,
SAM9X6, SAM9X7)



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