μ
PD720210
5. Pin Strapping
R19UH0093EJ0200 Rev.2.00
Page 36 of 59
May 26, 2014
5.1.7 GIO
function
This configuration sets the GIO pin function. GIO pin output can be set to CLKOUT signal or SUSPEND signal.
The CLKOUT function is intended for use by a non-removable device that needs a 24 MHz clock, without
having to use a dedicated 24 MHz oscillator for the downstream device. Likewise, NRDRSTB (5.1.9) is also
intended for such a device.
[Pin Strapping Setting]
Table 5-8. GIO Function
No Configuration
SPICSB OCI1B Definition
7
GIO(SUSPEND/NRDCLKO) pin function
0
0
CLKOUT Output
0
1
Suspend Output
1
X
ROM Setting
[Note]
1. SUSPEND/NRDCLKO output level is Hi-Z till this pin function is configured SUSPEND output or clock
output for non-removable device.
2. When use the CLKOUT output mode, SUSPEND/NRDCLKO pin needs to be set Pull-down.
3.
When use the Suspend output mode, SUSPEND/NRDCLKO pin needs to be set Pull-up.
4.
When External ROM is used and the clock output function is used, the frequency of the clock output can be
set to 12MHz or 24MHz using the
μ
PD720210
ROM Writing Tool for Windows.
5.1.8
Address length of External ROM
This configuration sets the address length of the external ROM, when the external SPI ROM is used.
[Pin Strapping Setting]
Table 5-9. Address Length of External ROM
No Configuration
SPISCB
SPISO/
LED3B
SPISI/
LED2B
LED1B/
SUSPEND
Definition
8
Address length of Ext SPI
ROM
0
X
X
X
Non external SPI ROM
1
0
1
1
24bit (1)
1
Others
16bit (2)
(1) Only SPI Serial Flash ROM is supported.
(2) Only SPI EEPROM is supported.
Summary of Contents for Renesas mPD720210
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